# node-jvm

**Repository Path**: mirrors/node-jvm

## Basic Information

- **Project Name**: node-jvm
- **Description**: java virtual machine in pure node.js
- **Primary Language**: JavaScript
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: https://www.oschina.net/p/node-jvm
- **GVP Project**: No

## Statistics

- **Stars**: 2
- **Forks**: 0
- **Created**: 2017-04-02
- **Last Updated**: 2026-01-17

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

node-jvm  [![Build Status](https://travis-ci.org/YaroslavGaponov/node-jvm.png?branch=master)](https://travis-ci.org/YaroslavGaponov/node-jvm)
========


## Overview

node-jvm - jvm in pure node.js


## Example

### java
```java
public class Main {
    public static long fib(int n) {
        if (n <= 1) return n;
        return fib(n-1) + fib(n-2);
    }
    
    public static void main(String[] args) {
        if (args.length == 0) {
                System.out.print("help: java Main.class {Number}");
                return;
        }
        
        int N = Integer.parseInt(args[0]);
        long start = System.currentTimeMillis();            
        System.out.format("Fibonacci from 1 to %s:\n", N);
        for (int i = 1; i <= N; i++) {
            System.out.println(i + ": " + fib(i));
        }
        long stop = System.currentTimeMillis();
        System.out.println("time: " + (stop - start) + "ms");
        
        System.out.println("done.");
    }
}
```

### node.js
```javascript
var JVM = require("node-jvm");
var jvm = new JVM();
jvm.setLogLevel(7);
var entryPointClassName = jvm.loadJarFile("./Main.jar");
jvm.setEntryPointClassName(entryPointClassName);
jvm.on("exit", function(code) {
    process.exit(code);
});
jvm.run([15]);
```

### build java files
`cd examples/fibonacci; make`

### run jvm
`./fibonacci.js`

### clean
`make clean`

### output
```
Fibonacci from 1 to 15:
1: 1
2: 1
3: 2
4: 3
5: 5
6: 8
7: 13
8: 21
9: 34
10: 55
11: 89
12: 144
13: 233
14: 377
15: 610
time: 106ms
done.
```

### other examples
`cd examples/`

```
arrays - working with different types of arrays 
dogs - simple object-oriented programming
fibonacci - recursion
jsclass - java and javascript mix
switcher - working with different switches
cast - cast for different types
ex - program exceptions
ex2 - jvm exceptions
idogs - working with interface
static - working with static objects
threads - multithreading
```


## Developer

Yaroslav Gaponov (yaroslav.gaponov -at - gmail.com)

## License

The MIT License (MIT)

Copyright (c) 2013 Yaroslav Gaponov

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.