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public 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 void unlockAndNotify() {		this.unlock();		this.notify();	}		public void timedWait(int timeout) throws InterruptedException {				long abortTime = Timing.currentTime() + timeout;				while (isLocked() && Timing.currentTime() < abortTime)			wait(abortTime - Timing.currentTime());	}		public void untimedWait() throws InterruptedException {				while (isLocked())			wait();	}}