A JVM written in Go.

jvm.go is a new JVM (which is far from complete) programmed in Go. The main purpose of this project is learning Go and the JVM. So the number one goal of the project is readability of code. The basic idea is to just implement the core JVM, and use rt.jar (from OpenJDK) as its class library. The garbage collector is implemented by directly using Go’s GC. For me, the hardest part is Thread and ClassLoader.

• Mac OS X 10.10.2
• Java 1.8.0_31
• Go 1.4

go get github.com/zxh0/jvm.go/jvmgo

Ensure your Java version is 1.8.0_32 and JAVA_HOME env was set

jvmgo -XuseJavaHome -cp path/to/jars:path/to/classes HelloWorld

Download zulu1.8.0_31-8.5.0.1-macosx.zip (Zulu is a certified build of OpenJDK that is fully compliant with the Java SE standard.) and unzip it to somewhere, Copy jvmgo from $GOPATH/bin/ into unzipped folder

cd path/to/zulu1.8.0_31-8.5.0.1-macosx
jvmgo -cp path/to/jars:path/to/classes HelloWorld

Create a Java source file, Main.java:

public class Main {

    public static void main(String []args){
        String val = "hello world";
        if(args != null && args.length > 0){
            val = args[0];
        }
        System.out.println(val);
    }
}

Compile Main.java, which will generate Main.class:

javac Main.java

Run with jvmgo:

jvmgo Main

Output:

hello world