/**
 * Babble is an example of thread creation,
 * each Babble thread prints a messages, waits
 * a fixed time, and repeats forever.
 */
class Babble extends Thread {
    private String msg;
    private int delay;

    public Babble( String msg, int delay ) {
	this.msg = msg;
	this.delay = delay;
    }

    public void run() {
	try {
	    for( ;; ) { // common infinte loop idiom
		System.out.println( msg );
		sleep( delay );
	    }
	}
	catch( InterruptedException e ) {
	    return; // end of this thread
	}
    }

    /**
     * Creates two babblng threads, the initial
     * thread exists.
     */
    public static void main( String[] args )  {
	Thread t1 = new Babble( "hi", 250 );
	Thread t2 = new Babble( "hello", 500 );
	t1.start();
	t2.start();
    }
}