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https://github.com/konsoletyper/teavm

Compiles Java bytecode to JavaScript, WebAssembly and C
https://github.com/konsoletyper/teavm

aot java javascript jvm webassembly

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Compiles Java bytecode to JavaScript, WebAssembly and C

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README 

        
# TeaVM



[![.github/workflows/ci.yml](https://github.com/konsoletyper/teavm/actions/workflows/ci.yml/badge.svg)](https://github.com/konsoletyper/teavm/actions/workflows/ci.yml)

[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.teavm/teavm-maven-plugin/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.teavm/teavm-maven-plugin) 

[![Download](https://teavm.org/maven/latestBadge.svg)](https://teavm.org/maven/_latest)

[![Gitter chat](https://img.shields.io/badge/gitter-join%20chat-green.svg)](https://gitter.im/teavm/Lobby)



See documentation at the [project web site](https://teavm.org/).



Useful links:



* [Getting started](https://teavm.org/docs/intro/getting-started.html)

* [Gallery](https://teavm.org/gallery.html)

* [Site source code repository](https://github.com/konsoletyper/teavm-site)

* [Discussion on Google Groups](https://groups.google.com/forum/#!forum/teavm)



## Building TeaVM



Simply clone source code (`git clone https://github.com/konsoletyper/teavm.git`)

and run Gradle build (`./gradlew publishToMavenLocal` or `gradlew.bat publishToMavenLocal`).

You should build samples separately, as described in [corresponding readme file](samples/README.md).



### Useful Gradle tasks



* `:tools:classlib-comparison-gen:build` – build Java class library compatibility report.

  result is available at: `tools/classlib-comparison-gen/build/jcl-support`



## Embedding TeaVM



If you are not satisfied with Maven, you can embed TeaVM in your program 

or even create your own plugin for any build tool, like Ant or Gradle.

The starting point for you may be `org.teavm.tooling.TeaVMTool` class from `teavm-tooling` artifact. 

You may want to go deeper and use `org.teavm.vm.TeaVM` from `teavm-core` artifact, learn how `TeaVMTool` initializes it. 

To learn how to use `TeaVMTool` class itself, find its usages across project source code. 

You most likely encounter Maven and IDEA plugins.

  

Please, notice that these APIs for embedding are still unstable and may change between versions.



## WebAssembly



WebAssembly support is in experimental status. It may lack major features available in JavaScript backend. 

There's no documentation yet, and you should do many things by hands 

(like embedding generated `wasm` file into your page, importing JavaScript objects, etc).

Look at [samples/benchmark](https://github.com/konsoletyper/teavm/blob/master/samples/benchmark/) module.

You should first examine `pom.xml` file to learn how to build `wasm` file from Java.

Then you may want to examine `index-teavm.html` and `index-teavm.js`

to learn how to embed WebAssembly into your web page.



## License

 

TeaVM is distributed under [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).

TeaVM does not rely on OpenJDK or code or other (L)GPL code.

TeaVM has its own reimplementation of Java class library, which is either implemented from scratch or

based on non-(L)GPL projects:



* [Apache Harmony](https://harmony.apache.org/) (Apache 2.0)

* [Joda-Time](https://github.com/JodaOrg/joda-time) (Apache 2.0)

* [jzlib](https://github.com/ymnk/jzlib) (BSD style license)



If you want to contribute code to implementation of Java class library, 

please make sure it's not based on OpenJDK or other code licensed under (L)GPL.



## Feedback



More information is available at the official site: https://teavm.org.



Ask your questions by email: [email protected]. Also, you can report issues on a project's

[issue tracker](https://github.com/konsoletyper/teavm/issues).