class SimpleThread extends Thread {
    public SimpleThread(String str) {
	super(str);
    }
    public void run() {
	for (int i = 0; i < 10; i++) {
	    System.out.println(i + " " + getName());
            try {
		sleep((int)(Math.random() * 1000));
	    } catch (InterruptedException e) {}
	}
	System.out.println("DONE! " + getName());
    }
}

class TwoThreadsTest {
    public static void main (String args[]) {
        new SimpleThread("Jamaica").start();
        new SimpleThread("Fiji").start();
    }
}

	 0 Jamaica
         0 Fiji
         1 Fiji
         1 Jamaica
         2 Jamaica
         2 Fiji
         3 Fiji
         3 Jamaica
         4 Jamaica
         4 Fiji
         5 Jamaica
         5 Fiji
         6 Fiji
         6 Jamaica
         7 Jamaica
         7 Fiji
         8 Fiji
         9 Fiji
         8 Jamaica
         DONE! Fiji
         9 Jamaica
         DONE! Jamaica
 

ThreeThreadsTest.java

class ThreeThreadsTest {
    public static void main (String args[]) {
        new SimpleThread("Jamaica").start();
        new SimpleThread("Fiji").start();
        new SimpleThread("Bora Bora").start();
    }
}

Como seria a saída?