package console;

class Useless {

	public static boolean b = true;

	public synchronized void u1(){
		while(b == true){
			try {
				wait();
			}catch(InterruptedException i) {

			}
		}

	}



	public synchronized void u2() {
		if (b == true) {
			b = false;
		}
		notify();
	}
}


public class SleepMessages extends Thread {

	private Useless u;
	private long time;

	public SleepMessages(Useless u, long time) {
		this.u=u;
		this.time=time;
	}
	public void run() {
		String importantInfo[] = {
				"Mares eat oats",
		"Does eat oats" };

		for (int i = 0; i < importantInfo.length; i++) {

			u.u1();

			System.out.println(importantInfo[i] + " - " +
					getName() + "  " + (System.currentTimeMillis()-time) + "ms");
			try {
				sleep(2000);
			} catch(InterruptedException e) {}
		}
	}
	public static void main(String args[]) throws
	InterruptedException {

		long time = System.currentTimeMillis();

		Useless u = new Useless();
		Thread t1 = new SleepMessages(u, time);
		t1.setName("t1");
		Thread t2 = new SleepMessages(u, time);
		t2.setName("t2");
		t1.start(); t2.start();
		sleep(2000);
		System.out.println("Here they go!..." + (System.currentTimeMillis() - time) + "ms");
		t1.interrupt();
		sleep(1000);
		t2.interrupt();
		u.u2();
		sleep(1000);
		u.u2();
	}
}