Consumer Producer problem.

package com.tutorials.threading;

public class ConsumerProducerProblem {
	int value = 0;
	volatile boolean hasChanged = false;

	public void produce(int value) throws InterruptedException {
		while (hasChanged == true) {
		}
		System.out.println("Value set:" + value);
		this.value = value;
		hasChanged = true;
	}

	public void consume() throws InterruptedException {
		while (hasChanged == false) {
		}
		System.out.println(Thread.currentThread().getName()
				+ " consumed value:" + value);
		hasChanged = false;
	}

	public static void main(String... s) {
		final ConsumerProducerProblem myObj = new ConsumerProducerProblem();
		new Thread() {
			@Override
			public void run() {
				for (int i = 0; i <= 30; i++) {
					try {
						myObj.produce(i);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
			}
		}.start();
		new Thread("first consumer") {
			@Override
			public void run() {
				for (int i = 0; i <= 30; i++) {
					try {
						myObj.consume();
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
			}
		}.start();
	}
}