子线程父线程交替执行（示例）

package cn.waitandnotify2;

public class RunnableTest {
	private boolean flag = true;

	public synchronized void zi(int change) {
		if (!flag) {
			try {
				this.wait();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		for (int i = 1; i <= 5; i++) {
			System.out.println("子线程" + change + "执行" + i + "次");
		}
		flag = false;
		this.notify();
	}

	public synchronized void fu(int change) {
		if (flag) {
			try {
				this.wait();
			} catch (InterruptedException e) {
				// TODO Auto-gen*erated catch block
				e.printStackTrace();
			}
		}
		for (int i = 1; i <= 5; i++) {
			System.out.println("父线程" + change + "执行" + i + "次");
		}
		flag = true;
		this.notify();
	}

}

package cn.waitandnotify2;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		new Test().work();
	
	}

	public void work() {
		final RunnableTest test = new RunnableTest();
		new Thread(new Runnable() {
			public void run() {
				for (int i = 1; i <= 3; i++) {
					test.zi(i);
				}
			}
		}).start();
		for (int i = 1; i <= 3; i++) {
			test.fu(i);
		}

	}
}