JNI: Getting Started

Write something simple in a java class such as below:

package com.sample;

class HelloWorld {
    public native void print();
    public static void main(String[] args) {
        new HelloWorld().print();
    }
    static {
        System.loadLibrary("HelloWorld");
    }
}

Compile the java class

javac HelloWorld

Use javah to spit out the JNI header file

javah -jni -classpath "(path.to.src)" com.sample.HelloWorld