node-java-bridge

NodeJS java bridge API

Usage no npm install needed!

<script type="module">
  import nodeJavaBridge from 'https://cdn.skypack.dev/node-java-bridge';
</script>

README

Description

bridge API for node-java repository

This API allows you:

  1. call static method easily without knowing class path

  2. create java instance with "new" keyword

ChangeLogs

  1. 2018/06/23: (1.0.22) Add example code
  2. 2018/06/22: (1.0.21) Update ReadMe-Usage, refactor jar-bridge.js & jar-class-loader.js, rename Main.jar to JarBridge.jar, remove unused class of JarBridge.java
  3. 2018/06/21: (1.0.6) UpdateReadMe
  4. 2018/06/21: (1.0.5) Integrate instance method & static methods, refactor jar-bridge.js
  5. 2018/06/20: (1.0.4) Remove unused object javaAPI
  6. 2018/06/20: (1.0.3) Replace all "let" with "var" for nodeJS compatibility
  7. 2018/06/20: (1.0.2) Update jar file for JavaSE-1.7 compatibility

Compatibility

  1. Java 1.7 or higher

Installation

npm install node-java-example

or 

yarn add node-java-example

1. Configure java path(for jar command).
   if there is no jdk installation, you can also put jar file into your project,
   and add following scripts:
   process.env.Path += ';<your_jar_path>';

Usage

  • Import module

    • const nodeJavaBridge = require('node-java-bridge');

  • Load All Jar Classes

    • Limitation: if jar is too large, it will throw array size exceed error.

      nodeJavaBridge.load(jarPath, {sync: true}) .then((api) => { console.log('---- Instance ----'); console.log(api.Base); var b1 = new api.Base(); console.log(b1.call('my arg'));

        console.log('---- End of Instance ----');

  console.log('---- Static Methods ----');
  console.log(api.Main.Foo());
  console.log('---- End of Static Methods ----');

      }, (err) => { console.log('Error'); console.log(err); }) .catch((err) => { console.log('---- Catch ----'); console.log(err); });

  • Load part of jar

    nodeJavaBridge.addClassPath('./Main.jar'); var Main = nodeJavaBridge.loadJarModuleAsync('com/example/api/Main'); console.log(Main);

    console.log('---- dumpMethods ----'); console.log(nodeJavaBridge.getClassMethods('com.example.api.instance.Concrete')); console.log('---- End of dumpMethods ----');

[References]

Github: node-java