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();
		}
	}
}