Mine

class Monitor {	private boolean locked;	public Monitor() { this.locked = true; }	public void lock() { this.locked = true; }	public void unlock() { this.locked = false; }	public boolean isLocked() { return this.locked; }}public class MyClass {		// seconds MyClass is willing to wait for a worker to finish executing	public static final int WAITTIME = 4;		// seconds a Worker takes to execute	private static final int RUNTIME = 10;		public static void main(String[] args) throws Exception {		Monitor monitor = new Monitor();		Worker worker = new Worker(monitor, RUNTIME);		System.out.println("MyClass: Worker should timeout after " + WAITTIME + " seconds");		System.out.println("MyClass: starting worker");		worker.start();		synchronized (monitor) {			while (monitor.isLocked())				monitor.wait(1000*WAITTIME);		}		System.out.println("MyClass: done");	}}class Worker extends Thread {		// the monitor to notify when finished executing	private Monitor monitor;	private int runtime;		public Worker(Monitor monitor, int runtime) {		this.monitor = monitor;		this.runtime = runtime;	}		public void run() {		System.out.println("Worker: running for " + runtime + " seconds");		System.out.print("Worker: executing");		try {			int count = 0;			while (count++ < runtime) {				System.out.print(" " + count);				Thread.sleep(1000);			}		}		catch (InterruptedException e) {}		System.out.println("\nWorker: finished executing");		synchronized (monitor) {			System.out.println("Worker: unlocking and notifying supplied monitor");			monitor.unlock(); // to satisfy MyClass loop condition			monitor.notify();		}	}}