🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 127 (from laksa069)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa127.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://developer.android.com/studio/write/create-java-class\')), getAhrefsUnparsedNoserviceFromURL(\'https://developer.android.com/studio/write/create-java-class\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/developer.android.com\/studio\/write\/create-java-class","crawl_time":1774238042,"first_indexed_time":1525851936,"http_code":200,"src_unparsed":"com,android!developer,\/studio\/write\/create-java-class s443","src_root_hash":"18420266955115890527","history_drop_reason":null,"meta_title":"Create a Java class or type | Android Studio | Android Developers","meta_descriptions":["With the Create New Class dialog and file templates, Android Studio helps you to quickly create new classes and types."],"attrs_boilerpipe_text":"Create a Java class or type\nStay organized with collections\nSave and categorize content based on your preferences.\nOn this page\nViewing and customizing file templates\nCreating a Java class or type\nAndroid Studio file templates\nAnnotationType file template\nClass file template\nEnum file template\nInterface file template\nSingleton file template\nFile template variables\nWith the\nCreate New Class\ndialog and file templates, Android\nStudio helps you to quickly create the following new classes and types:\nJava classes\nEnumeration and singleton classes\nInterface and annotation types\nAfter you fill in the\nCreate New Class\ndialog fields and click\nOK\n, Android Studio creates a\n.java\nfile containing\nskeleton code, including a package statement, any necessary imports, a header,\nand a class or type declaration. Next, you can add your code to this file.\nFile templates specify how Android Studio generates the skeleton code. You can\nuse the file templates provided with Android Studio as is, or customize them to\nsuit your development process.\nViewing and customizing file templates\nAndroid Studio provides file templates that determine how new Java classes and\ntypes are created with the\nCreate New Class\ndialog. You can\ncustomize these templates.\nFigure 1\n. The\nCreate New Class\ndialog.\nThe Android Studio file templates include Velocity Template Language (\nVTL\n) code\nand variables that handle these additional options.\nThe\nCreate New Class\ndialog uses the\nAnnotationType\n,\nClass\n,\nEnum\n,\nInterface\n, and\nSingleton\nfile templates.\nTo view the templates, find customizations, and modify the templates, follow\nthese steps:\nDo one of the following:\nFor Windows or Linux, select\nFile > Settings > Editor > File and Code\nTemplates > Files\n.\nFor macOS, select\nAndroid Studio > Preferences > Editor > File and Code\nTemplates > Files\n.\nIn the\ntemplate list\n,\ninternal template names are in bold font. Customized template names are\ndisplayed in a highlight color, such as blue.\nCustomize the file templates as needed.\nIf you want to use the\nCreate New Class\ndialog fields, make sure your\nchanges comply with the\nAndroid Studio file template code\n.\nFor more information about file templates, including VTL, see\nFile\nand Code Templates\nand\nFile\nand Code Templates Dialog\n.\nCreating a Java class or type\nAndroid Studio helps you to create new Java classes; enumeration and singleton\nclasses; and interface and annotation types based on\nfile templates\n.\nTo create a new Java class or type, follow these steps:\nIn the\nProject\nwindow, right-click a Java file or folder,\nand select\nNew\n>\nJava Class\n.\nAlternatively, select a Java file or folder in the\nProject\nwindow, or click in a Java file in the Code Editor. Then select\nFile\n>\nNew\n>\nJava Class\n.\nThe item you select determines the default package for the new class or type.\nIn the\nCreate New Class\ndialog, fill in the fields:\nName\n- The name of the new class or type. It must comply\nwith Java name requirements. Don’t type a file name extension.\nKind\n- Select the category of class or type.\nSuperclass\n- The class that your new class inherits from.\nYou can type the package and class name, or just the class name and then\ndouble-click an item in the drop-down list to autocomplete it.\nInterface(s)\n- One or more interfaces that the new class or\ntype implements. Multiple interfaces should be separated by a comma followed by an\noptional space. You can type the package and interface name, or just the\ninterface name and then double-click an item in the drop-down list to\nautocomplete it.\nAutocomplete works for the first interface name only. Note that while\nthe comma and the following interface name can bring up a tooltip error, you can\n  ignore the error because it doesn’t affect the generated code.\nPackage\n- The package that the class or type will reside\nin. The default automatically appears in the field. If you type a package name\nin the field, any portions of the package identifier that don’t exist are\nhighlighted red; in this case, Android Studio creates the package after you\nclick\nOK\n. This field must contain a value; otherwise, the Java\nfile won’t contain a\npackage\nstatement, and the class or type won’t\n  be placed within a package in the project.\nThe default depends on how you\nlaunched the\nCreate New Class\ndialog. If you first selected a\nJava file or folder in the\nProject\nwindow, the default is the\npackage for the item you selected. If you first clicked in a Java file in the Code Editor, the\n  default is the package that contains this file.\nVisibility\n- Select whether the class or type is visible to\nall classes, or just to those in its own package.\nModifiers\n- Select the\nAbstract\nor\nFinal\nmodifier for a\nClass\n, or neither.\nShow Select Overrides Dialog\n- For a\nKind\nof\nClass\n, check this option to open the\nSelect\nMethods to Override\/Implement dialog\nafter you click\nOK\n. In\nthis dialog, you can select methods that you would like to override or\nimplement, and Android Studio will generate skeleton code for these methods.\nAny fields that don’t apply to the\nKind\nare hidden.\nClick\nOK\n.\nAndroid Studio creates a Java file with skeleton code that you can modify. It\nopens the file in the Code Editor.\nNote:\nYou can create a singleton class by selecting\nFile\n>\nNew\n>\nSingleton\nor\nFile\n>\nNew\n>\nJava Class\n; the\nlatter technique offers more options.\nAndroid Studio file templates\nThis section lists the Android Studio file template code written in the\nVTL\nscripting language, followed\nby definitions of the variables. The values that you provide in the\nCreate New Class\ndialog become the variable values in the template.\nNote that the lines that begin with\n#if (${VISIBILITY}\nextend all the way to the open brace (\n{\n).\nAnnotation\nType file template\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end @interface ${NAME} #if (${INTERFACES} != \"\")extends ${INTERFACES} #end {\n}\nClass file template\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end #if (${ABSTRACT} == \"TRUE\")abstract #end #if (${FINAL} == \"TRUE\")final #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\nEnum file template\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\nInterface file template\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n#end {\n}\nSingleton file template\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n    private static final ${NAME} ourInstance = new ${NAME}();\n\n    #if (${VISIBILITY} == \"PUBLIC\")public #end static ${NAME} getInstance() {\n        return ourInstance;\n    }\n\n    private ${NAME}() {\n    }\n}\nFile template variables\nAndroid Studio replaces file template variables with values in the generated\nJava file. You enter the values in the\nCreate New Class\ndialog.\nThe template has the following variables that you can use:\nIMPORT_BLOCK\n- A newline-delimited list of Java\nimport\nstatements necessary to support any superclass or\ninterfaces, or an empty string (\n\"\"\n). For example, If you only\nimplement the\nRunnable\ninterface and extend nothing, this variable\nwill be\n\"import java.lang.Runnable;\\n\"\n. If you implement the\nRunnable\ninterface and extend the\nActivity\nclass, it will be\n\"import android.app.Activity;\\nimportjava.lang.Runnable;\\n\"\n.\nVISIBILITY\n- Whether the class will have public access or not.\nIt can have a value of\nPUBLIC\nor\nPACKAGE_PRIVATE\n.\nSUPERCLASS\n- A single class name, or empty. If present, there\nwill be an\nextends ${SUPERCLASS}\nclause after the new class name.\nINTERFACES\n- A comma-separated list of interfaces, or empty. If\npresent, there will be an\nimplements ${INTERFACES}\nclause after the\nsuperclass, or after the class name if there’s no superclass. For interfaces and\nannotation types, the interfaces have the\nextends\nkeyword.\nABSTRACT\n- Whether the class should be abstract or not. It can\nhave a value of\nTRUE\nor\nFALSE\n.\nFINAL\n- Whether the class should be final or not. It can have a\nvalue of\nTRUE\nor\nFALSE\n.\nContent and code samples on this page are subject to the licenses described in the\nContent License\n. Java and OpenJDK are trademarks or registered trademarks of Oracle and\/or its affiliates.\nLast updated 2026-03-18 UTC.\n[[[\"Easy to understand\",\"easyToUnderstand\",\"thumb-up\"],[\"Solved my problem\",\"solvedMyProblem\",\"thumb-up\"],[\"Other\",\"otherUp\",\"thumb-up\"]],[[\"Missing the information I need\",\"missingTheInformationINeed\",\"thumb-down\"],[\"Too complicated \/ too many steps\",\"tooComplicatedTooManySteps\",\"thumb-down\"],[\"Out of date\",\"outOfDate\",\"thumb-down\"],[\"Samples \/ code issue\",\"samplesCodeIssue\",\"thumb-down\"],[\"Other\",\"otherDown\",\"thumb-down\"]],[\"Last updated 2026-03-18 UTC.\"],[],[]]","attrs_markdown":"[Skip to main content](https:\/\/developer.android.com\/studio\/write\/create-java-class#main-content)\n\n[![Android 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build guides](https:\/\/developer.android.com\/build\/gradle-build-overview)\n\nMore\n\n[SDK tools guides](https:\/\/developer.android.com\/tools)\n\n[![Android Developers](https:\/\/www.gstatic.com\/devrel-devsite\/prod\/v8b8ef181e1dc913802015af34f7ea88ee446e0cb5daec5c977ac4c46a7a372bd\/android\/images\/lockup.png)](https:\/\/developer.android.com\/)\n\n- [Essentials](https:\/\/developer.android.com\/get-started)\n  - More\n- [Design & Plan](https:\/\/developer.android.com\/design)\n  - More\n- [Develop](https:\/\/developer.android.com\/develop)\n  - More\n  - [Download](https:\/\/developer.android.com\/studio)\n  - [IDE guides](https:\/\/developer.android.com\/studio\/intro)\n  - [Gemini in Android Studio](https:\/\/developer.android.com\/gemini-in-android)\n  - [Android Studio preview](https:\/\/developer.android.com\/studio\/preview)\n  - [Gradle build guides](https:\/\/developer.android.com\/build\/gradle-build-overview)\n  - [SDK tools 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[Install Android Studio](https:\/\/developer.android.com\/studio\/install)\n  - [New UI in Android Studio](https:\/\/developer.android.com\/studio\/intro\/new-ui)\n  - Get to know the UI\n    \n    - [Overview](https:\/\/developer.android.com\/studio\/intro\/user-interface)\n    - [Accessibility features](https:\/\/developer.android.com\/studio\/intro\/accessibility)\n    - [Keyboard shortcuts](https:\/\/developer.android.com\/studio\/intro\/keyboard-shortcuts)\n  - [Workflow basics](https:\/\/developer.android.com\/studio\/workflow)\n- Manage your project\n  \n  - [Overview](https:\/\/developer.android.com\/studio\/projects)\n  - [Create a project](https:\/\/developer.android.com\/studio\/projects\/create-project)\n  - [Migrate to Android Studio](https:\/\/developer.android.com\/studio\/intro\/migrate)\n  - [Version control basics](https:\/\/developer.android.com\/studio\/projects\/version-control)\n  - [Configure the IDE](https:\/\/developer.android.com\/studio\/intro\/studio-config)\n  - [Update the IDE and tools](https:\/\/developer.android.com\/studio\/intro\/update)\n  - [About Play Feature Delivery](https:\/\/developer.android.com\/guide\/app-bundle\/dynamic-delivery)\n  - Add C and C++ code\n    \n    - [Overview](https:\/\/developer.android.com\/studio\/projects\/add-native-code)\n    - [Install NDK and CMake](https:\/\/developer.android.com\/studio\/projects\/install-ndk)\n    - [Configure the NDK for AGP](https:\/\/developer.android.com\/studio\/projects\/configure-agp-ndk)\n    - [Configure CMake](https:\/\/developer.android.com\/studio\/projects\/configure-cmake)\n    - [Link Gradle](https:\/\/developer.android.com\/studio\/projects\/gradle-external-native-builds)\n  - [Create an Android library](https:\/\/developer.android.com\/studio\/projects\/android-library)\n  - [Set up continuous integration](https:\/\/developer.android.com\/studio\/projects\/continuous-integration)\n- Write your code\n  \n  - [Write your code quicker and more efficiently](https:\/\/developer.android.com\/studio\/write)\n  - Work with templates\n    \n    - [Add code from a template](https:\/\/developer.android.com\/studio\/projects\/templates)\n    - [Find sample code](https:\/\/developer.android.com\/studio\/write\/sample-code)\n    - [Create a Java class or type](https:\/\/developer.android.com\/studio\/write\/create-java-class)\n  - [Add a module for a new device](https:\/\/developer.android.com\/studio\/projects\/add-app-module)\n  - [Use Java 8 language features](https:\/\/developer.android.com\/studio\/write\/java8-support)\n  - [Java 8 language support table](https:\/\/developer.android.com\/studio\/write\/java8-support-table)\n  - [Add app resources](https:\/\/developer.android.com\/studio\/write\/add-resources)\n  - Use tools to develop UI\n    \n    - [Develop a layout with Compose ⍈](https:\/\/developer.android.com\/jetpack\/compose\/tooling\/previews)\n    - [Develop a layout with Views](https:\/\/developer.android.com\/studio\/write\/layout-editor)\n    - [Create animations with Compose ⍈](https:\/\/developer.android.com\/develop\/ui\/compose\/animation\/introduction)\n    - [Manage UI resources](https:\/\/developer.android.com\/studio\/write\/resource-manager)\n    - [Add multi-density vector graphics](https:\/\/developer.android.com\/studio\/write\/vector-asset-studio)\n    - [Create app icons](https:\/\/developer.android.com\/studio\/write\/create-app-icons)\n    - [Create resizable bitmaps (9-patch)](https:\/\/developer.android.com\/studio\/write\/draw9patch)\n    - [Create WebP images](https:\/\/developer.android.com\/studio\/write\/convert-webp)\n    - [Localize the UI](https:\/\/developer.android.com\/studio\/write\/translations-editor)\n  - [Add Android app links](https:\/\/developer.android.com\/studio\/write\/app-link-indexing)\n  - [Connect to Firebase](https:\/\/developer.android.com\/studio\/write\/firebase)\n  - [Improve your code with lint checks](https:\/\/developer.android.com\/studio\/write\/lint)\n  - [Improve code inspection with annotations](https:\/\/developer.android.com\/studio\/write\/annotations)\n  - [Tools attributes reference](https:\/\/developer.android.com\/studio\/write\/tool-attributes)\n- Run and debug your app\n  \n  - [Overview](https:\/\/developer.android.com\/studio\/run)\n  - Run your app on virtual devices\n    \n    - [Create and manage virtual devices](https:\/\/developer.android.com\/studio\/run\/managing-avds)\n    - Run your app with Android Emulator\n      \n      - [Overview](https:\/\/developer.android.com\/studio\/run\/emulator)\n      - [Test on multiple screen sizes](https:\/\/developer.android.com\/studio\/run\/resizable-emulator)\n      - [Take screenshots](https:\/\/developer.android.com\/studio\/run\/emulator-take-screenshots)\n      - [Record the screen](https:\/\/developer.android.com\/studio\/run\/emulator-record-screen)\n      - [Use the camera](https:\/\/developer.android.com\/studio\/run\/emulator-use-camera)\n      - [Launch in a separate window](https:\/\/developer.android.com\/studio\/run\/emulator-launch-separate-window)\n      - [Launch without running an app](https:\/\/developer.android.com\/studio\/run\/emulator-launch-without-app)\n      - [Install and add files](https:\/\/developer.android.com\/studio\/run\/emulator-install-add-files)\n      - Use advanced Android Emulator features\n        \n        - [Use extended controls](https:\/\/developer.android.com\/studio\/run\/emulator-extended-controls)\n        - [Use snapshots](https:\/\/developer.android.com\/studio\/run\/emulator-snapshots)\n        - [Use the emulator from the command line](https:\/\/developer.android.com\/studio\/run\/emulator-commandline)\n        - [Send console commands](https:\/\/developer.android.com\/studio\/run\/emulator-console)\n        - [Configure hardware acceleration](https:\/\/developer.android.com\/studio\/run\/emulator-acceleration)\n        - [Emulator feature comparison](https:\/\/developer.android.com\/studio\/run\/emulator-comparison)\n      - Use emulator networking\n        \n        - [Overview](https:\/\/developer.android.com\/studio\/run\/emulator-networking)\n        - [Interconnect emulators](https:\/\/developer.android.com\/studio\/run\/emulator-networking-interconnect)\n        - [Network addresses](https:\/\/developer.android.com\/studio\/run\/emulator-networking-address)\n        - [Set up proxy](https:\/\/developer.android.com\/studio\/run\/emulator-networking-proxy)\n        - [Set up DNS](https:\/\/developer.android.com\/studio\/run\/emulator-networking-dns)\n        - [Set up voice\/SMS](https:\/\/developer.android.com\/studio\/run\/emulator-networking-voice)\n        - [Advanced networking](https:\/\/developer.android.com\/studio\/run\/emulator-networking-advanced)\n      - [Troubleshoot emulator](https:\/\/developer.android.com\/studio\/run\/emulator-troubleshooting)\n  - [Android Device Streaming](https:\/\/developer.android.com\/studio\/run\/android-device-streaming)\n  - Run your app on a local device\n    \n    - [Get started](https:\/\/developer.android.com\/studio\/run\/device)\n    - [Install OEM USB drivers](https:\/\/developer.android.com\/studio\/run\/oem-usb)\n    - [Get the Google USB driver](https:\/\/developer.android.com\/studio\/run\/win-usb)\n  - Debug your code\n    \n    - [Get started debugging your code](https:\/\/developer.android.com\/studio\/debug)\n    - [Configure developer options](https:\/\/developer.android.com\/studio\/debug\/dev-options)\n    - [Write and view logs](https:\/\/developer.android.com\/studio\/debug\/logcat)\n    - Analyze and address crash issues\n      \n      - [Analyze a stack trace](https:\/\/developer.android.com\/studio\/debug\/stacktraces)\n      - [Analyze Crashlytics and Vitals reports](https:\/\/developer.android.com\/studio\/debug\/app-quality-insights)\n    - [Debug your layout](https:\/\/developer.android.com\/studio\/debug\/layout-inspector)\n    - [View design issues](https:\/\/developer.android.com\/studio\/debug\/universal-problems-panel)\n    - [Inspect network traffic](https:\/\/developer.android.com\/studio\/debug\/network-profiler)\n    - [Debug your database](https:\/\/developer.android.com\/studio\/inspect\/database)\n    - [Debug your WorkManager Workers](https:\/\/developer.android.com\/studio\/inspect\/task)\n    - [View on-device files](https:\/\/developer.android.com\/studio\/debug\/device-file-explorer)\n    - [Debug pre-built APKs](https:\/\/developer.android.com\/studio\/debug\/apk-debugger)\n    - [Take a screenshot](https:\/\/developer.android.com\/studio\/debug\/am-screenshot)\n    - [Record a video](https:\/\/developer.android.com\/studio\/debug\/am-video)\n    - [Capture and read bug reports](https:\/\/developer.android.com\/studio\/debug\/bug-report)\n    - [Analyze your APK or AAB](https:\/\/developer.android.com\/studio\/debug\/apk-analyzer)\n  - [Customize run\/debug configurations](https:\/\/developer.android.com\/studio\/run\/rundebugconfig)\n- Test your code\n  \n  - [Choose a testing method](https:\/\/developer.android.com\/studio\/test)\n  - [Test in Android Studio](https:\/\/developer.android.com\/studio\/test\/test-in-android-studio)\n  - [Test with build-managed devices](https:\/\/developer.android.com\/studio\/test\/managed-devices)\n  - [Test against screen changes](https:\/\/developer.android.com\/studio\/test\/espresso-api)\n  - [Test from the command line](https:\/\/developer.android.com\/studio\/test\/command-line)\n  - [Set up advanced test configurations](https:\/\/developer.android.com\/studio\/test\/advanced-test-setup)\n  - Use specialized testing tools\n    \n    - [Create UI tests](https:\/\/developer.android.com\/studio\/test\/other-testing-tools\/espresso-test-recorder)\n    - [Set up automatic testing of your code](https:\/\/developer.android.com\/studio\/test\/other-testing-tools\/app-crawler)\n    - [Stress-test your code with user events](https:\/\/developer.android.com\/studio\/test\/other-testing-tools\/monkey)\n- Inspect performance issues\n  \n  - [Overview](https:\/\/developer.android.com\/studio\/profile)\n  - Record a system trace\n    \n    - [Overview](https:\/\/developer.android.com\/studio\/profile\/cpu-profiler)\n    - [Inspect traces](https:\/\/developer.android.com\/studio\/profile\/inspect-traces)\n    - [Detect UI jank](https:\/\/developer.android.com\/studio\/profile\/jank-detection)\n    - [Inspect power usage](https:\/\/developer.android.com\/studio\/profile\/power-profiler)\n    - [Generate trace logs](https:\/\/developer.android.com\/studio\/profile\/generate-trace-logs)\n  - [Capture a heap dump](https:\/\/developer.android.com\/studio\/profile\/capture-heap-dump)\n  - [Sample the callstack](https:\/\/developer.android.com\/studio\/profile\/sample-callstack)\n  - [Record Java\/Kotlin allocations](https:\/\/developer.android.com\/studio\/profile\/record-java-kotlin-allocations)\n  - [Record Java\/Kotlin methods](https:\/\/developer.android.com\/studio\/profile\/record-java-kotlin-methods)\n  - [Record native allocations](https:\/\/developer.android.com\/studio\/profile\/record-native-allocations)\n  - [Inspect your app live](https:\/\/developer.android.com\/studio\/profile\/inspect-app-live)\n  - [Inspect pre-built APKs](https:\/\/developer.android.com\/studio\/profile\/apk-profiler)\n  - [Run the standalone profiler](https:\/\/developer.android.com\/studio\/profile\/standalone-profiler)\n  - [Build and run a profileable app manually](https:\/\/developer.android.com\/studio\/profile\/build-run-manually)\n  - Chart glossary\n    \n    - [Call chart](https:\/\/developer.android.com\/studio\/profile\/chart-glossary\/call-chart)\n    - [Events table](https:\/\/developer.android.com\/studio\/profile\/chart-glossary\/events-table)\n    - [Flame chart](https:\/\/developer.android.com\/studio\/profile\/chart-glossary\/flame-chart)\n    - [Process memory (RSS)](https:\/\/developer.android.com\/studio\/profile\/chart-glossary\/process-memory)\n    - [Top down and bottom up charts](https:\/\/developer.android.com\/studio\/profile\/chart-glossary\/top-bottom-charts)\n- Publish your app\n  \n  - [Overview](https:\/\/developer.android.com\/studio\/publish)\n  - [Play Policy Insights](https:\/\/developer.android.com\/studio\/publish\/insights)\n  - [Prepare for release](https:\/\/developer.android.com\/studio\/publish\/preparing)\n  - [Version your app](https:\/\/developer.android.com\/studio\/publish\/versioning)\n  - [Sign your app](https:\/\/developer.android.com\/studio\/publish\/app-signing)\n  - [Upload your app](https:\/\/developer.android.com\/studio\/publish\/upload-bundle)\n- [Troubleshoot](https:\/\/developer.android.com\/studio\/troubleshoot)\n- [Known issues](https:\/\/developer.android.com\/studio\/known-issues)\n- [Report a bug](https:\/\/developer.android.com\/studio\/report-bugs)\n\n- Build AI experiences\n- [Get started](https:\/\/developer.android.com\/ai)\n- Get started\n- [Hello world](https:\/\/developer.android.com\/get-started\/overview)\n- [Training courses](https:\/\/developer.android.com\/courses)\n- [Tutorials](https:\/\/developer.android.com\/get-started\/codelabs)\n- [Compose for teams](https:\/\/developer.android.com\/develop\/ui\/compose\/adopt)\n- [Kotlin for Android](https:\/\/developer.android.com\/kotlin)\n- [Monetization with Play ↗️](https:\/\/play.google.com\/console\/about\/guides\/play-commerce\/)\n- [Android Developer Verification](https:\/\/developer.android.com\/developer-verification)\n- Extend by device\n- [Adaptive apps](https:\/\/developer.android.com\/adaptive-apps)\n- [Android XR](https:\/\/developer.android.com\/xr)\n- [Wear OS](https:\/\/developer.android.com\/wear)\n- [Android for Cars](https:\/\/developer.android.com\/cars)\n- [Android TV](https:\/\/developer.android.com\/tv)\n- [ChromeOS](https:\/\/developer.android.com\/chrome-os)\n- Build by category\n- [Games](https:\/\/developer.android.com\/games)\n- [Camera & media](https:\/\/developer.android.com\/media)\n- [Social & messaging](https:\/\/developer.android.com\/social-and-messaging)\n- [Health & fitness](https:\/\/developer.android.com\/health-and-fitness)\n- [Productivity](https:\/\/developer.android.com\/productivity)\n- [Enterprise apps](https:\/\/developer.android.com\/work\/overview)\n- Get the latest\n- [Latest updates](https:\/\/developer.android.com\/latest-updates)\n- [Experimental updates](https:\/\/developer.android.com\/latest-updates\/experimental)\n- [Android Studio preview](https:\/\/developer.android.com\/studio\/preview)\n- [Jetpack & Compose libraries](https:\/\/developer.android.com\/jetpack\/androidx\/versions)\n- [Wear OS releases](https:\/\/developer.android.com\/training\/wearables\/versions\/latest)\n- [Privacy Sandbox ↗️](https:\/\/developer.android.com\/design-for-safety\/privacy-sandbox)\n\n- Excellent Experiences\n- [Learn more](https:\/\/developer.android.com\/quality\/excellent)\n- UI Design\n- [Design for Android](https:\/\/developer.android.com\/design\/ui)\n- [Mobile](https:\/\/developer.android.com\/design\/ui\/mobile)\n- [Desktop experiences](https:\/\/developer.android.com\/design\/ui\/desktop)\n- [XR Headsets & XR Glasses](https:\/\/developer.android.com\/design\/ui\/xr)\n- [AI Glasses](https:\/\/developer.android.com\/design\/ui\/ai-glasses)\n- [Widgets](https:\/\/developer.android.com\/design\/ui\/widget)\n- [Wear OS](https:\/\/developer.android.com\/design\/ui\/wear)\n- [Android TV](https:\/\/developer.android.com\/design\/ui\/tv)\n- [Android for Cars](https:\/\/developer.android.com\/design\/ui\/cars)\n- Architecture\n- [Introduction](https:\/\/developer.android.com\/topic\/architecture\/intro)\n- [Libraries](https:\/\/developer.android.com\/topic\/libraries\/view-binding)\n- [Navigation](https:\/\/developer.android.com\/guide\/navigation\/navigation-principles)\n- [Modularization](https:\/\/developer.android.com\/topic\/modularization)\n- [Testing](https:\/\/developer.android.com\/training\/testing\/fundamentals)\n- [Kotlin Multiplatform](https:\/\/developer.android.com\/kotlin\/multiplatform)\n- Quality\n- [Overview](https:\/\/developer.android.com\/quality)\n- [Core value](https:\/\/developer.android.com\/quality\/core-value)\n- [User experience](https:\/\/developer.android.com\/quality\/user-experience)\n- [Accessibility](https:\/\/developer.android.com\/guide\/topics\/ui\/accessibility)\n- [Technical quality](https:\/\/developer.android.com\/quality\/technical)\n- [Excellent Experiences](https:\/\/developer.android.com\/quality\/excellent)\n- Security\n- [Overview](https:\/\/developer.android.com\/security)\n- [Privacy](https:\/\/developer.android.com\/privacy)\n- [Permissions](https:\/\/developer.android.com\/privacy#app-permissions)\n- [Identity](https:\/\/developer.android.com\/identity)\n- [Fraud prevention](https:\/\/developer.android.com\/security\/fraud-prevention)\n\n- Gemini in Android Studio\n- [Learn more](https:\/\/developer.android.com\/gemini-in-android)\n- [Get Android Studio](https:\/\/developer.android.com\/studio)\n- Core areas\n- [Samples](https:\/\/developer.android.com\/samples)\n- [User interfaces](https:\/\/developer.android.com\/develop\/ui)\n- [Background work](https:\/\/developer.android.com\/develop\/background-work)\n- [Data and files](https:\/\/developer.android.com\/guide\/topics\/data)\n- [Connectivity](https:\/\/developer.android.com\/develop\/connectivity)\n- [All core areas ⤵️](https:\/\/developer.android.com\/develop#core-areas)\n- Tools and workflow\n- [Write and debug code](https:\/\/developer.android.com\/studio\/write)\n- [Build projects](https:\/\/developer.android.com\/build\/gradle-build-overview)\n- [Test your app](https:\/\/developer.android.com\/training\/testing)\n- [Performance](https:\/\/developer.android.com\/topic\/performance\/overview)\n- [Command-line tools](https:\/\/developer.android.com\/tools)\n- [Gradle plugin API](https:\/\/developer.android.com\/reference\/tools\/gradle-api)\n- [Android Bench](https:\/\/developer.android.com\/bench)\n- Device tech\n- [Adaptive UI](https:\/\/developer.android.com\/guide\/topics\/large-screens\/get-started-with-large-screens)\n- [Wear OS](https:\/\/developer.android.com\/training\/wearables)\n- [Android XR](https:\/\/developer.android.com\/develop\/xr)\n- [Android Health](https:\/\/developer.android.com\/health-and-fitness\/guides)\n- [Android for Cars](https:\/\/developer.android.com\/training\/cars)\n- [Android TV](https:\/\/developer.android.com\/training\/tv)\n- [All devices ⤵️](https:\/\/developer.android.com\/develop#devices)\n- Libraries\n- [Android platform](https:\/\/developer.android.com\/reference\/packages)\n- [Jetpack libraries](https:\/\/developer.android.com\/jetpack\/androidx\/explorer)\n- [Compose libraries](https:\/\/developer.android.com\/jetpack\/androidx\/releases\/compose)\n- [Google Play services ↗️](https:\/\/developers.google.com\/android\/reference\/packages)\n- [Google Play SDK index ↗️](https:\/\/play.google.com\/sdks)\n\n- Play Console\n- [Go to Play Console](https:\/\/play.google.com\/console)\n- [Learn more ↗️](https:\/\/play.google.com\/console\/about\/)\n- Fundamentals\n- [Play Monetization](https:\/\/developer.android.com\/distribute\/play-billing)\n- [Play Integrity](https:\/\/developer.android.com\/google\/play\/integrity)\n- [Play Policies](https:\/\/developer.android.com\/distribute\/play-policies)\n- [Play Programs ↗️](https:\/\/play.google.com\/console\/about\/programs)\n- Games Dev Center\n- [Overview](https:\/\/developer.android.com\/games)\n- [Play Asset Delivery](https:\/\/developer.android.com\/guide\/playcore\/asset-delivery)\n- [Play Games Services](https:\/\/developer.android.com\/games\/pgs\/overview)\n- [Play Games on PC](https:\/\/developer.android.com\/games\/playgames\/overview)\n- [All Play guides ⤵️](https:\/\/developer.android.com\/distribute)\n- Libraries\n- [Play Feature Delivery](https:\/\/developer.android.com\/guide\/playcore\/feature-delivery)\n- [Play In-app Updates](https:\/\/developer.android.com\/guide\/playcore\/in-app-updates)\n- [Play In-app Reviews](https:\/\/developer.android.com\/guide\/playcore\/in-app-review)\n- [Play Install Referrer](https:\/\/developer.android.com\/google\/play\/installreferrer)\n- [Google Play services ↗️](https:\/\/developers.google.com\/android\/reference\/packages)\n- [Google Play SDK index ↗️](https:\/\/play.google.com\/sdks)\n- [All Play libraries ⤵️](https:\/\/developer.android.com\/distribute)\n- Tools & resources\n- [Android App Bundles](https:\/\/developer.android.com\/guide\/app-bundle)\n- [Brand & marketing](https:\/\/developer.android.com\/distribute\/marketing-tools)\n- [Play Console APIs ↗️](https:\/\/developers.google.com\/android-publisher\/api-ref\/rest)\n\n- On this page\n- [Viewing and customizing file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#viewing-templates)\n- [Creating a Java class or type](https:\/\/developer.android.com\/studio\/write\/create-java-class#creating-class)\n- [Android Studio file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates)\n  - [AnnotationType file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#annotation)\n  - [Class file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#class)\n  - [Enum file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#enum)\n  - [Interface file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#interface)\n  - [Singleton file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#singleton)\n  - [File template variables](https:\/\/developer.android.com\/studio\/write\/create-java-class#variables)\n\n- [Android Developers](https:\/\/developer.android.com\/)\n- [Develop](https:\/\/developer.android.com\/develop)\n- [Android Studio](https:\/\/developer.android.com\/studio)\n- [IDE guides](https:\/\/developer.android.com\/studio\/intro)\n\nWas this helpful?\n# Create a Java class or typeStay organized with collections Save and categorize content based on your preferences.\n- On this page\n- [Viewing and customizing file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#viewing-templates)\n- [Creating a Java class or type](https:\/\/developer.android.com\/studio\/write\/create-java-class#creating-class)\n- [Android Studio file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates)\n  - [AnnotationType file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#annotation)\n  - [Class file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#class)\n  - [Enum file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#enum)\n  - [Interface file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#interface)\n  - [Singleton file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#singleton)\n  - [File template variables](https:\/\/developer.android.com\/studio\/write\/create-java-class#variables)\n\nWith the **Create New Class** dialog and file templates, Android Studio helps you to quickly create the following new classes and types:\n\n- Java classes\n- Enumeration and singleton classes\n- Interface and annotation types\n\nAfter you fill in the **Create New Class** dialog fields and click **OK**, Android Studio creates a `.java` file containing skeleton code, including a package statement, any necessary imports, a header, and a class or type declaration. Next, you can add your code to this file.\n\nFile templates specify how Android Studio generates the skeleton code. You can use the file templates provided with Android Studio as is, or customize them to suit your development process.\n\n## Viewing and customizing file templates\nAndroid Studio provides file templates that determine how new Java classes and types are created with the **Create New Class** dialog. You can customize these templates.\n\n![The Create New Class dialog.](https:\/\/developer.android.com\/static\/studio\/images\/write\/create-new-class.png)\n\n**Figure 1**. The **Create New Class** dialog.\n\nThe Android Studio file templates include Velocity Template Language ([VTL](https:\/\/velocity.apache.org\/engine\/)) code and variables that handle these additional options. The **Create New Class** dialog uses the **AnnotationType**, **Class**, **Enum**, **Interface**, and **Singleton** file templates.\n\nTo view the templates, find customizations, and modify the templates, follow these steps:\n\n1. Do one of the following:\n   - For Windows or Linux, select **File \\> Settings \\> Editor \\> File and Code Templates \\> Files**.\n   - For macOS, select **Android Studio \\> Preferences \\> Editor \\> File and Code Templates \\> Files**.\n   In the [template list](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/settings-file-and-code-templates.html), internal template names are in bold font. Customized template names are displayed in a highlight color, such as blue.\n2. Customize the file templates as needed.\n   If you want to use the **Create New Class** dialog fields, make sure your changes comply with the [Android Studio file template code](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates).\n\nFor more information about file templates, including VTL, see [File and Code Templates](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/file-and-code-templates.html) and [File and Code Templates Dialog](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/settings-file-and-code-templates.html).\n\n## Creating a Java class or type\nAndroid Studio helps you to create new Java classes; enumeration and singleton classes; and interface and annotation types based on [file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates).\n\nTo create a new Java class or type, follow these steps:\n\n1. In the **Project** window, right-click a Java file or folder, and select **New** \\> **Java Class**.\n2. In the **Create New Class** dialog, fill in the fields:\n   - **Name** - The name of the new class or type. It must comply with Java name requirements. Don’t type a file name extension.\n   - **Kind** - Select the category of class or type.\n   - **Superclass** - The class that your new class inherits from. You can type the package and class name, or just the class name and then double-click an item in the drop-down list to autocomplete it.\n   - **Interface(s)** - One or more interfaces that the new class or type implements. Multiple interfaces should be separated by a comma followed by an optional space. You can type the package and interface name, or just the interface name and then double-click an item in the drop-down list to autocomplete it.\n   - **Package** - The package that the class or type will reside in. The default automatically appears in the field. If you type a package name in the field, any portions of the package identifier that don’t exist are highlighted red; in this case, Android Studio creates the package after you click **OK**. This field must contain a value; otherwise, the Java file won’t contain a `package` statement, and the class or type won’t be placed within a package in the project.\n   - **Visibility** - Select whether the class or type is visible to all classes, or just to those in its own package.\n   - **Modifiers** - Select the **Abstract** or **Final** modifier for a **Class**, or neither.\n   - **Show Select Overrides Dialog** - For a **Kind** of **Class**, check this option to open the [Select Methods to Override\/Implement dialog](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/overriding-methods-of-a-superclass.html) after you click **OK**. In this dialog, you can select methods that you would like to override or implement, and Android Studio will generate skeleton code for these methods.\n3. Click **OK**.\n\n**Note:** You can create a singleton class by selecting **File** \\> **New** \\> **Singleton** or **File** \\> **New** \\> **Java Class**; the latter technique offers more options.\n\n## Android Studio file templates\nThis section lists the Android Studio file template code written in the [VTL](https:\/\/velocity.apache.org\/engine\/) scripting language, followed by definitions of the variables. The values that you provide in the **Create New Class** dialog become the variable values in the template. Note that the lines that begin with `#if (${VISIBILITY}` extend all the way to the open brace ( `{` ).\n\n### Annotation Type file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end @interface ${NAME} #if (${INTERFACES} != \"\")extends ${INTERFACES} #end {\n}\n```\n### Class file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end #if (${ABSTRACT} == \"TRUE\")abstract #end #if (${FINAL} == \"TRUE\")final #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\n```\n### Enum file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\n```\n### Interface file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n#end {\n}\n```\n### Singleton file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n    private static final ${NAME} ourInstance = new ${NAME}();\n\n    #if (${VISIBILITY} == \"PUBLIC\")public #end static ${NAME} getInstance() {\n        return ourInstance;\n    }\n\n    private ${NAME}() {\n    }\n}\n```\n### File template variables\nAndroid Studio replaces file template variables with values in the generated Java file. You enter the values in the **Create New Class** dialog. The template has the following variables that you can use:\n\n- `IMPORT_BLOCK` - A newline-delimited list of Java `import` statements necessary to support any superclass or interfaces, or an empty string (`\"\"`). For example, If you only implement the `Runnable` interface and extend nothing, this variable will be `\"import java.lang.Runnable;\\n\"`. If you implement the `Runnable` interface and extend the `Activity` class, it will be `\"import android.app.Activity;\\nimportjava.lang.Runnable;\\n\"`.\n- `VISIBILITY` - Whether the class will have public access or not. It can have a value of `PUBLIC` or `PACKAGE_PRIVATE`.\n- `SUPERCLASS` - A single class name, or empty. If present, there will be an `extends ${SUPERCLASS}` clause after the new class name.\n- `INTERFACES` - A comma-separated list of interfaces, or empty. If present, there will be an `implements ${INTERFACES}` clause after the superclass, or after the class name if there’s no superclass. For interfaces and annotation types, the interfaces have the `extends` keyword.\n- `ABSTRACT` - Whether the class should be abstract or not. It can have a value of `TRUE` or `FALSE`.\n- `FINAL` - Whether the class should be final or not. It can have a value of `TRUE` or `FALSE`.\n\nWas this helpful?\n\nContent and code samples on this page are subject to the licenses described in the [Content License](https:\/\/developer.android.com\/license). Java and OpenJDK are trademarks or registered trademarks of Oracle and\/or its affiliates.\n\nLast updated 2026-03-18 UTC.\n\n\\[\\[\\[\"Easy to understand\",\"easyToUnderstand\",\"thumb-up\"\\],\\[\"Solved my problem\",\"solvedMyProblem\",\"thumb-up\"\\],\\[\"Other\",\"otherUp\",\"thumb-up\"\\]\\],\\[\\[\"Missing the information I need\",\"missingTheInformationINeed\",\"thumb-down\"\\],\\[\"Too complicated \/ too many steps\",\"tooComplicatedTooManySteps\",\"thumb-down\"\\],\\[\"Out of date\",\"outOfDate\",\"thumb-down\"\\],\\[\"Samples \/ code issue\",\"samplesCodeIssue\",\"thumb-down\"\\],\\[\"Other\",\"otherDown\",\"thumb-down\"\\]\\],\\[\"Last updated 2026-03-18 UTC.\"\\],\\[\\],\\[\\]\\]\n\n- [![X](https:\/\/developer.android.com\/_static\/android\/images\/logo-x.svg) X](https:\/\/x.com\/AndroidDev)\n  Follow @AndroidDev on X\n- [![YouTube](https:\/\/www.gstatic.com\/images\/icons\/material\/product\/2x\/youtube_48dp.png) YouTube](https:\/\/www.youtube.com\/user\/androiddevelopers)\n  Check out Android Developers on YouTube\n- [![LinkedIn](https:\/\/developer.android.com\/_static\/android\/images\/logo-linkedin.svg) LinkedIn](https:\/\/www.linkedin.com\/showcase\/androiddev)\n  Connect with the Android Developers community on LinkedIn\n\n- ### More Android\n  - 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[AnnotationType file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#annotation)\n  - [Class file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#class)\n  - [Enum file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#enum)\n  - [Interface file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#interface)\n  - [Singleton file template](https:\/\/developer.android.com\/studio\/write\/create-java-class#singleton)\n  - [File template variables](https:\/\/developer.android.com\/studio\/write\/create-java-class#variables)\n\nWith the **Create New Class** dialog and file templates, Android Studio helps you to quickly create the following new classes and types:\n\n- Java classes\n- Enumeration and singleton classes\n- Interface and annotation types\n\nAfter you fill in the **Create New Class** dialog fields and click **OK**, Android Studio creates a `.java` file containing skeleton code, including a package statement, any necessary imports, a header, and a class or type declaration. Next, you can add your code to this file.\n\nFile templates specify how Android Studio generates the skeleton code. You can use the file templates provided with Android Studio as is, or customize them to suit your development process.\n\n## Viewing and customizing file templates\nAndroid Studio provides file templates that determine how new Java classes and types are created with the **Create New Class** dialog. You can customize these templates.\n\n![The Create New Class dialog.](https:\/\/developer.android.com\/static\/studio\/images\/write\/create-new-class.png)\n\n**Figure 1**. The **Create New Class** dialog.\n\nThe Android Studio file templates include Velocity Template Language ([VTL](https:\/\/velocity.apache.org\/engine\/)) code and variables that handle these additional options. The **Create New Class** dialog uses the **AnnotationType**, **Class**, **Enum**, **Interface**, and **Singleton** file templates.\n\nTo view the templates, find customizations, and modify the templates, follow these steps:\n\n1. Do one of the following:\n   - For Windows or Linux, select **File \\> Settings \\> Editor \\> File and Code Templates \\> Files**.\n   - For macOS, select **Android Studio \\> Preferences \\> Editor \\> File and Code Templates \\> Files**.\n   In the [template list](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/settings-file-and-code-templates.html), internal template names are in bold font. Customized template names are displayed in a highlight color, such as blue.\n2. Customize the file templates as needed.\n   If you want to use the **Create New Class** dialog fields, make sure your changes comply with the [Android Studio file template code](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates).\n\nFor more information about file templates, including VTL, see [File and Code Templates](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/file-and-code-templates.html) and [File and Code Templates Dialog](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/settings-file-and-code-templates.html).\n\n## Creating a Java class or type\nAndroid Studio helps you to create new Java classes; enumeration and singleton classes; and interface and annotation types based on [file templates](https:\/\/developer.android.com\/studio\/write\/create-java-class#templates).\n\nTo create a new Java class or type, follow these steps:\n\n1. In the **Project** window, right-click a Java file or folder, and select **New** \\> **Java Class**.\n2. In the **Create New Class** dialog, fill in the fields:\n   - **Name** - The name of the new class or type. It must comply with Java name requirements. Don’t type a file name extension.\n   - **Kind** - Select the category of class or type.\n   - **Superclass** - The class that your new class inherits from. You can type the package and class name, or just the class name and then double-click an item in the drop-down list to autocomplete it.\n   - **Interface(s)** - One or more interfaces that the new class or type implements. Multiple interfaces should be separated by a comma followed by an optional space. You can type the package and interface name, or just the interface name and then double-click an item in the drop-down list to autocomplete it.\n   - **Package** - The package that the class or type will reside in. The default automatically appears in the field. If you type a package name in the field, any portions of the package identifier that don’t exist are highlighted red; in this case, Android Studio creates the package after you click **OK**. This field must contain a value; otherwise, the Java file won’t contain a `package` statement, and the class or type won’t be placed within a package in the project.\n   - **Visibility** - Select whether the class or type is visible to all classes, or just to those in its own package.\n   - **Modifiers** - Select the **Abstract** or **Final** modifier for a **Class**, or neither.\n   - **Show Select Overrides Dialog** - For a **Kind** of **Class**, check this option to open the [Select Methods to Override\/Implement dialog](https:\/\/www.jetbrains.com\/help\/idea\/2025.3\/overriding-methods-of-a-superclass.html) after you click **OK**. In this dialog, you can select methods that you would like to override or implement, and Android Studio will generate skeleton code for these methods.\n3. Click **OK**.\n\n**Note:** You can create a singleton class by selecting **File** \\> **New** \\> **Singleton** or **File** \\> **New** \\> **Java Class**; the latter technique offers more options.\n\n## Android Studio file templates\nThis section lists the Android Studio file template code written in the [VTL](https:\/\/velocity.apache.org\/engine\/) scripting language, followed by definitions of the variables. The values that you provide in the **Create New Class** dialog become the variable values in the template. Note that the lines that begin with `#if (${VISIBILITY}` extend all the way to the open brace ( `{` ).\n\n### Annotation Type file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end @interface ${NAME} #if (${INTERFACES} != \"\")extends ${INTERFACES} #end {\n}\n```\n### Class file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end #if (${ABSTRACT} == \"TRUE\")abstract #end #if (${FINAL} == \"TRUE\")final #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\n```\n### Enum file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n}\n```\n### Interface file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end enum ${NAME} #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n#end {\n}\n```\n### Singleton file template\n```\n#if (${PACKAGE_NAME} != \"\")package ${PACKAGE_NAME};#end\n\n#if (${IMPORT_BLOCK} != \"\")${IMPORT_BLOCK}\n#end\n#parse(\"File Header.java\")\n\n#if (${VISIBILITY} == \"PUBLIC\")public #end class ${NAME} #if (${SUPERCLASS} != \"\")extends ${SUPERCLASS} #end #if (${INTERFACES} != \"\")implements ${INTERFACES} #end {\n    private static final ${NAME} ourInstance = new ${NAME}();\n\n    #if (${VISIBILITY} == \"PUBLIC\")public #end static ${NAME} getInstance() {\n        return ourInstance;\n    }\n\n    private ${NAME}() {\n    }\n}\n```\n### File template variables\nAndroid Studio replaces file template variables with values in the generated Java file. You enter the values in the **Create New Class** dialog. The template has the following variables that you can use:\n\n- `IMPORT_BLOCK` - A newline-delimited list of Java `import` statements necessary to support any superclass or interfaces, or an empty string (`\"\"`). For example, If you only implement the `Runnable` interface and extend nothing, this variable will be `\"import java.lang.Runnable;\\n\"`. If you implement the `Runnable` interface and extend the `Activity` class, it will be `\"import android.app.Activity;\\nimportjava.lang.Runnable;\\n\"`.\n- `VISIBILITY` - Whether the class will have public access or not. It can have a value of `PUBLIC` or `PACKAGE_PRIVATE`.\n- `SUPERCLASS` - A single class name, or empty. If present, there will be an `extends ${SUPERCLASS}` clause after the new class name.\n- `INTERFACES` - A comma-separated list of interfaces, or empty. If present, there will be an `implements ${INTERFACES}` clause after the superclass, or after the class name if there’s no superclass. For interfaces and annotation types, the interfaces have the `extends` keyword.\n- `ABSTRACT` - Whether the class should be abstract or not. It can have a value of `TRUE` or `FALSE`.\n- `FINAL` - Whether the class should be final or not. It can have a value of `TRUE` or `FALSE`.\n\nContent and code samples on this page are subject to the licenses described in the [Content License](https:\/\/developer.android.com\/license). Java and OpenJDK are trademarks or registered trademarks of Oracle and\/or its affiliates.\n\nLast updated 2026-03-18 UTC.\n\n\\[\\[\\[\"Easy to understand\",\"easyToUnderstand\",\"thumb-up\"\\],\\[\"Solved my problem\",\"solvedMyProblem\",\"thumb-up\"\\],\\[\"Other\",\"otherUp\",\"thumb-up\"\\]\\],\\[\\[\"Missing the information I need\",\"missingTheInformationINeed\",\"thumb-down\"\\],\\[\"Too complicated \/ too many steps\",\"tooComplicatedTooManySteps\",\"thumb-down\"\\],\\[\"Out of date\",\"outOfDate\",\"thumb-down\"\\],\\[\"Samples \/ code issue\",\"samplesCodeIssue\",\"thumb-down\"\\],\\[\"Other\",\"otherDown\",\"thumb-down\"\\]\\],\\[\"Last updated 2026-03-18 UTC.\"\\],\\[\\],\\[\\]\\]","meta_canonical":null}

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URL	https://developer.android.com/studio/write/create-java-class
Last Crawled	2026-03-23 03:54:02 (28 days ago)
First Indexed	2018-05-09 07:45:36 (7 years ago)
HTTP Status Code	200
Meta Title	Create a Java class or type \| Android Studio \| Android Developers
Meta Description	With the Create New Class dialog and file templates, Android Studio helps you to quickly create new classes and types.
Meta Canonical	null
Boilerpipe Text	Create a Java class or type Stay organized with collections Save and categorize content based on your preferences. On this page Viewing and customizing file templates Creating a Java class or type Android Studio file templates AnnotationType file template Class file template Enum file template Interface file template Singleton file template File template variables With the Create New Class dialog and file templates, Android Studio helps you to quickly create the following new classes and types: Java classes Enumeration and singleton classes Interface and annotation types After you fill in the Create New Class dialog fields and click OK , Android Studio creates a .java file containing skeleton code, including a package statement, any necessary imports, a header, and a class or type declaration. Next, you can add your code to this file. File templates specify how Android Studio generates the skeleton code. You can use the file templates provided with Android Studio as is, or customize them to suit your development process. Viewing and customizing file templates Android Studio provides file templates that determine how new Java classes and types are created with the Create New Class dialog. You can customize these templates. Figure 1 . The Create New Class dialog. The Android Studio file templates include Velocity Template Language ( VTL ) code and variables that handle these additional options. The Create New Class dialog uses the AnnotationType , Class , Enum , Interface , and Singleton file templates. To view the templates, find customizations, and modify the templates, follow these steps: Do one of the following: For Windows or Linux, select File > Settings > Editor > File and Code Templates > Files . For macOS, select Android Studio > Preferences > Editor > File and Code Templates > Files . In the template list , internal template names are in bold font. Customized template names are displayed in a highlight color, such as blue. Customize the file templates as needed. If you want to use the Create New Class dialog fields, make sure your changes comply with the Android Studio file template code . For more information about file templates, including VTL, see File and Code Templates and File and Code Templates Dialog . Creating a Java class or type Android Studio helps you to create new Java classes; enumeration and singleton classes; and interface and annotation types based on file templates . To create a new Java class or type, follow these steps: In the Project window, right-click a Java file or folder, and select New > Java Class . Alternatively, select a Java file or folder in the Project window, or click in a Java file in the Code Editor. Then select File > New > Java Class . The item you select determines the default package for the new class or type. In the Create New Class dialog, fill in the fields: Name - The name of the new class or type. It must comply with Java name requirements. Don’t type a file name extension. Kind - Select the category of class or type. Superclass - The class that your new class inherits from. You can type the package and class name, or just the class name and then double-click an item in the drop-down list to autocomplete it. Interface(s) - One or more interfaces that the new class or type implements. Multiple interfaces should be separated by a comma followed by an optional space. You can type the package and interface name, or just the interface name and then double-click an item in the drop-down list to autocomplete it. Autocomplete works for the first interface name only. Note that while the comma and the following interface name can bring up a tooltip error, you can ignore the error because it doesn’t affect the generated code. Package - The package that the class or type will reside in. The default automatically appears in the field. If you type a package name in the field, any portions of the package identifier that don’t exist are highlighted red; in this case, Android Studio creates the package after you click OK . This field must contain a value; otherwise, the Java file won’t contain a package statement, and the class or type won’t be placed within a package in the project. The default depends on how you launched the Create New Class dialog. If you first selected a Java file or folder in the Project window, the default is the package for the item you selected. If you first clicked in a Java file in the Code Editor, the default is the package that contains this file. Visibility - Select whether the class or type is visible to all classes, or just to those in its own package. Modifiers - Select the Abstract or Final modifier for a Class , or neither. Show Select Overrides Dialog - For a Kind of Class , check this option to open the Select Methods to Override/Implement dialog after you click OK . In this dialog, you can select methods that you would like to override or implement, and Android Studio will generate skeleton code for these methods. Any fields that don’t apply to the Kind are hidden. Click OK . Android Studio creates a Java file with skeleton code that you can modify. It opens the file in the Code Editor. Note: You can create a singleton class by selecting File > New > Singleton or File > New > Java Class ; the latter technique offers more options. Android Studio file templates This section lists the Android Studio file template code written in the VTL scripting language, followed by definitions of the variables. The values that you provide in the Create New Class dialog become the variable values in the template. Note that the lines that begin with #if (${VISIBILITY} extend all the way to the open brace ( { ). Annotation Type file template #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end @interface ${NAME} #if (${INTERFACES} != "")extends ${INTERFACES} #end { } Class file template #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end #if (${ABSTRACT} == "TRUE")abstract #end #if (${FINAL} == "TRUE")final #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { } Enum file template #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { } Interface file template #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { #end { } Singleton file template #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { private static final ${NAME} ourInstance = new ${NAME}(); #if (${VISIBILITY} == "PUBLIC")public #end static ${NAME} getInstance() { return ourInstance; } private ${NAME}() { } } File template variables Android Studio replaces file template variables with values in the generated Java file. You enter the values in the Create New Class dialog. The template has the following variables that you can use: IMPORT_BLOCK - A newline-delimited list of Java import statements necessary to support any superclass or interfaces, or an empty string ( "" ). For example, If you only implement the Runnable interface and extend nothing, this variable will be "import java.lang.Runnable;\n" . If you implement the Runnable interface and extend the Activity class, it will be "import android.app.Activity;\nimportjava.lang.Runnable;\n" . VISIBILITY - Whether the class will have public access or not. It can have a value of PUBLIC or PACKAGE_PRIVATE . SUPERCLASS - A single class name, or empty. If present, there will be an extends ${SUPERCLASS} clause after the new class name. INTERFACES - A comma-separated list of interfaces, or empty. If present, there will be an implements ${INTERFACES} clause after the superclass, or after the class name if there’s no superclass. For interfaces and annotation types, the interfaces have the extends keyword. ABSTRACT - Whether the class should be abstract or not. It can have a value of TRUE or FALSE . FINAL - Whether the class should be final or not. It can have a value of TRUE or FALSE . Content and code samples on this page are subject to the licenses described in the Content License . Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. Last updated 2026-03-18 UTC. [[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-03-18 UTC."],[],[]]
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[Brand & marketing](https://developer.android.com/distribute/marketing-tools) - [Play Console APIs ↗️](https://developers.google.com/android-publisher/api-ref/rest) - On this page - [Viewing and customizing file templates](https://developer.android.com/studio/write/create-java-class#viewing-templates) - [Creating a Java class or type](https://developer.android.com/studio/write/create-java-class#creating-class) - [Android Studio file templates](https://developer.android.com/studio/write/create-java-class#templates) - [AnnotationType file template](https://developer.android.com/studio/write/create-java-class#annotation) - [Class file template](https://developer.android.com/studio/write/create-java-class#class) - [Enum file template](https://developer.android.com/studio/write/create-java-class#enum) - [Interface file template](https://developer.android.com/studio/write/create-java-class#interface) - [Singleton file template](https://developer.android.com/studio/write/create-java-class#singleton) - [File template variables](https://developer.android.com/studio/write/create-java-class#variables) - [Android Developers](https://developer.android.com/) - [Develop](https://developer.android.com/develop) - [Android Studio](https://developer.android.com/studio) - [IDE guides](https://developer.android.com/studio/intro) Was this helpful? # Create a Java class or typeStay organized with collections Save and categorize content based on your preferences. - On this page - [Viewing and customizing file templates](https://developer.android.com/studio/write/create-java-class#viewing-templates) - [Creating a Java class or type](https://developer.android.com/studio/write/create-java-class#creating-class) - [Android Studio file templates](https://developer.android.com/studio/write/create-java-class#templates) - [AnnotationType file template](https://developer.android.com/studio/write/create-java-class#annotation) - [Class file template](https://developer.android.com/studio/write/create-java-class#class) - [Enum file template](https://developer.android.com/studio/write/create-java-class#enum) - [Interface file template](https://developer.android.com/studio/write/create-java-class#interface) - [Singleton file template](https://developer.android.com/studio/write/create-java-class#singleton) - [File template variables](https://developer.android.com/studio/write/create-java-class#variables) With the Create New Class dialog and file templates, Android Studio helps you to quickly create the following new classes and types: - Java classes - Enumeration and singleton classes - Interface and annotation types After you fill in the Create New Class dialog fields and click OK, Android Studio creates a `.java` file containing skeleton code, including a package statement, any necessary imports, a header, and a class or type declaration. Next, you can add your code to this file. File templates specify how Android Studio generates the skeleton code. You can use the file templates provided with Android Studio as is, or customize them to suit your development process. ## Viewing and customizing file templates Android Studio provides file templates that determine how new Java classes and types are created with the Create New Class dialog. You can customize these templates. ![The Create New Class dialog.](https://developer.android.com/static/studio/images/write/create-new-class.png) Figure 1. The Create New Class dialog. The Android Studio file templates include Velocity Template Language ([VTL](https://velocity.apache.org/engine/)) code and variables that handle these additional options. The Create New Class dialog uses the AnnotationType, Class, Enum, Interface, and Singleton file templates. To view the templates, find customizations, and modify the templates, follow these steps: 1. Do one of the following: - For Windows or Linux, select File \> Settings \> Editor \> File and Code Templates \> Files. - For macOS, select Android Studio \> Preferences \> Editor \> File and Code Templates \> Files. In the [template list](https://www.jetbrains.com/help/idea/2025.3/settings-file-and-code-templates.html), internal template names are in bold font. Customized template names are displayed in a highlight color, such as blue. 2. Customize the file templates as needed. If you want to use the Create New Class dialog fields, make sure your changes comply with the [Android Studio file template code](https://developer.android.com/studio/write/create-java-class#templates). For more information about file templates, including VTL, see [File and Code Templates](https://www.jetbrains.com/help/idea/2025.3/file-and-code-templates.html) and [File and Code Templates Dialog](https://www.jetbrains.com/help/idea/2025.3/settings-file-and-code-templates.html). ## Creating a Java class or type Android Studio helps you to create new Java classes; enumeration and singleton classes; and interface and annotation types based on [file templates](https://developer.android.com/studio/write/create-java-class#templates). To create a new Java class or type, follow these steps: 1. In the Project window, right-click a Java file or folder, and select New \> Java Class. 2. In the Create New Class dialog, fill in the fields: - Name - The name of the new class or type. It must comply with Java name requirements. Don’t type a file name extension. - Kind - Select the category of class or type. - Superclass - The class that your new class inherits from. You can type the package and class name, or just the class name and then double-click an item in the drop-down list to autocomplete it. - Interface(s) - One or more interfaces that the new class or type implements. Multiple interfaces should be separated by a comma followed by an optional space. You can type the package and interface name, or just the interface name and then double-click an item in the drop-down list to autocomplete it. - Package - The package that the class or type will reside in. The default automatically appears in the field. If you type a package name in the field, any portions of the package identifier that don’t exist are highlighted red; in this case, Android Studio creates the package after you click OK. This field must contain a value; otherwise, the Java file won’t contain a `package` statement, and the class or type won’t be placed within a package in the project. - Visibility - Select whether the class or type is visible to all classes, or just to those in its own package. - Modifiers - Select the Abstract or Final modifier for a Class, or neither. - Show Select Overrides Dialog - For a Kind of Class, check this option to open the [Select Methods to Override/Implement dialog](https://www.jetbrains.com/help/idea/2025.3/overriding-methods-of-a-superclass.html) after you click OK. In this dialog, you can select methods that you would like to override or implement, and Android Studio will generate skeleton code for these methods. 3. Click OK. Note: You can create a singleton class by selecting File \> New \> Singleton or File \> New \> Java Class; the latter technique offers more options. ## Android Studio file templates This section lists the Android Studio file template code written in the [VTL](https://velocity.apache.org/engine/) scripting language, followed by definitions of the variables. The values that you provide in the Create New Class dialog become the variable values in the template. Note that the lines that begin with `#if (${VISIBILITY}` extend all the way to the open brace ( `{` ). ### Annotation Type file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end @interface ${NAME} #if (${INTERFACES} != "")extends ${INTERFACES} #end { } ``` ### Class file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end #if (${ABSTRACT} == "TRUE")abstract #end #if (${FINAL} == "TRUE")final #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { } ``` ### Enum file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { } ``` ### Interface file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { #end { } ``` ### Singleton file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { private static final ${NAME} ourInstance = new ${NAME}(); #if (${VISIBILITY} == "PUBLIC")public #end static ${NAME} getInstance() { return ourInstance; } private ${NAME}() { } } ``` ### File template variables Android Studio replaces file template variables with values in the generated Java file. You enter the values in the Create New Class dialog. The template has the following variables that you can use: - `IMPORT_BLOCK` - A newline-delimited list of Java `import` statements necessary to support any superclass or interfaces, or an empty string (`""`). For example, If you only implement the `Runnable` interface and extend nothing, this variable will be `"import java.lang.Runnable;\n"`. If you implement the `Runnable` interface and extend the `Activity` class, it will be `"import android.app.Activity;\nimportjava.lang.Runnable;\n"`. - `VISIBILITY` - Whether the class will have public access or not. It can have a value of `PUBLIC` or `PACKAGE_PRIVATE`. - `SUPERCLASS` - A single class name, or empty. If present, there will be an `extends ${SUPERCLASS}` clause after the new class name. - `INTERFACES` - A comma-separated list of interfaces, or empty. If present, there will be an `implements ${INTERFACES}` clause after the superclass, or after the class name if there’s no superclass. For interfaces and annotation types, the interfaces have the `extends` keyword. - `ABSTRACT` - Whether the class should be abstract or not. It can have a value of `TRUE` or `FALSE`. - `FINAL` - Whether the class should be final or not. It can have a value of `TRUE` or `FALSE`. Was this helpful? Content and code samples on this page are subject to the licenses described in the [Content License](https://developer.android.com/license). Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. 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Readable Markdown	## Create a Java class or typeStay organized with collections Save and categorize content based on your preferences. - On this page - [Viewing and customizing file templates](https://developer.android.com/studio/write/create-java-class#viewing-templates) - [Creating a Java class or type](https://developer.android.com/studio/write/create-java-class#creating-class) - [Android Studio file templates](https://developer.android.com/studio/write/create-java-class#templates) - [AnnotationType file template](https://developer.android.com/studio/write/create-java-class#annotation) - [Class file template](https://developer.android.com/studio/write/create-java-class#class) - [Enum file template](https://developer.android.com/studio/write/create-java-class#enum) - [Interface file template](https://developer.android.com/studio/write/create-java-class#interface) - [Singleton file template](https://developer.android.com/studio/write/create-java-class#singleton) - [File template variables](https://developer.android.com/studio/write/create-java-class#variables) With the Create New Class dialog and file templates, Android Studio helps you to quickly create the following new classes and types: - Java classes - Enumeration and singleton classes - Interface and annotation types After you fill in the Create New Class dialog fields and click OK, Android Studio creates a `.java` file containing skeleton code, including a package statement, any necessary imports, a header, and a class or type declaration. Next, you can add your code to this file. File templates specify how Android Studio generates the skeleton code. You can use the file templates provided with Android Studio as is, or customize them to suit your development process. ## Viewing and customizing file templates Android Studio provides file templates that determine how new Java classes and types are created with the Create New Class dialog. You can customize these templates. ![The Create New Class dialog.](https://developer.android.com/static/studio/images/write/create-new-class.png) Figure 1. The Create New Class dialog. The Android Studio file templates include Velocity Template Language ([VTL](https://velocity.apache.org/engine/)) code and variables that handle these additional options. The Create New Class dialog uses the AnnotationType, Class, Enum, Interface, and Singleton file templates. To view the templates, find customizations, and modify the templates, follow these steps: 1. Do one of the following: - For Windows or Linux, select File \> Settings \> Editor \> File and Code Templates \> Files. - For macOS, select Android Studio \> Preferences \> Editor \> File and Code Templates \> Files. In the [template list](https://www.jetbrains.com/help/idea/2025.3/settings-file-and-code-templates.html), internal template names are in bold font. Customized template names are displayed in a highlight color, such as blue. 2. Customize the file templates as needed. If you want to use the Create New Class dialog fields, make sure your changes comply with the [Android Studio file template code](https://developer.android.com/studio/write/create-java-class#templates). For more information about file templates, including VTL, see [File and Code Templates](https://www.jetbrains.com/help/idea/2025.3/file-and-code-templates.html) and [File and Code Templates Dialog](https://www.jetbrains.com/help/idea/2025.3/settings-file-and-code-templates.html). ## Creating a Java class or type Android Studio helps you to create new Java classes; enumeration and singleton classes; and interface and annotation types based on [file templates](https://developer.android.com/studio/write/create-java-class#templates). To create a new Java class or type, follow these steps: 1. In the Project window, right-click a Java file or folder, and select New \> Java Class. 2. In the Create New Class dialog, fill in the fields: - Name - The name of the new class or type. It must comply with Java name requirements. Don’t type a file name extension. - Kind - Select the category of class or type. - Superclass - The class that your new class inherits from. You can type the package and class name, or just the class name and then double-click an item in the drop-down list to autocomplete it. - Interface(s) - One or more interfaces that the new class or type implements. Multiple interfaces should be separated by a comma followed by an optional space. You can type the package and interface name, or just the interface name and then double-click an item in the drop-down list to autocomplete it. - Package - The package that the class or type will reside in. The default automatically appears in the field. If you type a package name in the field, any portions of the package identifier that don’t exist are highlighted red; in this case, Android Studio creates the package after you click OK. This field must contain a value; otherwise, the Java file won’t contain a `package` statement, and the class or type won’t be placed within a package in the project. - Visibility - Select whether the class or type is visible to all classes, or just to those in its own package. - Modifiers - Select the Abstract or Final modifier for a Class, or neither. - Show Select Overrides Dialog - For a Kind of Class, check this option to open the [Select Methods to Override/Implement dialog](https://www.jetbrains.com/help/idea/2025.3/overriding-methods-of-a-superclass.html) after you click OK. In this dialog, you can select methods that you would like to override or implement, and Android Studio will generate skeleton code for these methods. 3. Click OK. Note: You can create a singleton class by selecting File \> New \> Singleton or File \> New \> Java Class; the latter technique offers more options. ## Android Studio file templates This section lists the Android Studio file template code written in the [VTL](https://velocity.apache.org/engine/) scripting language, followed by definitions of the variables. The values that you provide in the Create New Class dialog become the variable values in the template. Note that the lines that begin with `#if (${VISIBILITY}` extend all the way to the open brace ( `{` ). ### Annotation Type file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end @interface ${NAME} #if (${INTERFACES} != "")extends ${INTERFACES} #end { } ``` ### Class file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end #if (${ABSTRACT} == "TRUE")abstract #end #if (${FINAL} == "TRUE")final #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { } ``` ### Enum file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { } ``` ### Interface file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end enum ${NAME} #if (${INTERFACES} != "")implements ${INTERFACES} #end { #end { } ``` ### Singleton file template ``` #if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end #if (${IMPORT_BLOCK} != "")${IMPORT_BLOCK} #end #parse("File Header.java") #if (${VISIBILITY} == "PUBLIC")public #end class ${NAME} #if (${SUPERCLASS} != "")extends ${SUPERCLASS} #end #if (${INTERFACES} != "")implements ${INTERFACES} #end { private static final ${NAME} ourInstance = new ${NAME}(); #if (${VISIBILITY} == "PUBLIC")public #end static ${NAME} getInstance() { return ourInstance; } private ${NAME}() { } } ``` ### File template variables Android Studio replaces file template variables with values in the generated Java file. You enter the values in the Create New Class dialog. The template has the following variables that you can use: - `IMPORT_BLOCK` - A newline-delimited list of Java `import` statements necessary to support any superclass or interfaces, or an empty string (`""`). For example, If you only implement the `Runnable` interface and extend nothing, this variable will be `"import java.lang.Runnable;\n"`. If you implement the `Runnable` interface and extend the `Activity` class, it will be `"import android.app.Activity;\nimportjava.lang.Runnable;\n"`. - `VISIBILITY` - Whether the class will have public access or not. It can have a value of `PUBLIC` or `PACKAGE_PRIVATE`. - `SUPERCLASS` - A single class name, or empty. If present, there will be an `extends ${SUPERCLASS}` clause after the new class name. - `INTERFACES` - A comma-separated list of interfaces, or empty. If present, there will be an `implements ${INTERFACES}` clause after the superclass, or after the class name if there’s no superclass. For interfaces and annotation types, the interfaces have the `extends` keyword. - `ABSTRACT` - Whether the class should be abstract or not. It can have a value of `TRUE` or `FALSE`. - `FINAL` - Whether the class should be final or not. It can have a value of `TRUE` or `FALSE`. Content and code samples on this page are subject to the licenses described in the [Content License](https://developer.android.com/license). Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. Last updated 2026-03-18 UTC. \[\[\["Easy to understand","easyToUnderstand","thumb-up"\],\["Solved my problem","solvedMyProblem","thumb-up"\],\["Other","otherUp","thumb-up"\]\],\[\["Missing the information I need","missingTheInformationINeed","thumb-down"\],\["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"\],\["Out of date","outOfDate","thumb-down"\],\["Samples / code issue","samplesCodeIssue","thumb-down"\],\["Other","otherDown","thumb-down"\]\],\["Last updated 2026-03-18 UTC."\],\[\],\[\]\]
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