public class ThreadExample extends Thread {
    public void run() {
    for (int i = 0; i < 3; i++)
	{
	    try {
		sleep((int)(Math.random() * 5000)); // 5 second
            } catch (InterruptedException e) { }
	    System.out.println(i);
	}
    }
    public static void main(String[] args) {
        new ThreadExample().start();
        new ThreadExample().start();
        System.out.println("Done");
    }
}