java Thread的wait,notify,wait,sleep简单示范代码

放开A代码会发现所有线程都能到达partA。==> wait是会释放锁的
交替放开B和C ，依次随机一个到达partB或者所有到达partB==> notify 通知任意wait,notifyAll 通知所有

package org.he.util;
/**
 * @author BenSon He
 * @email qing878@gmail.com ,qq 277803242
 * @since 20/11/2012
 */
public class Test extends Thread {
	Object lock = null;
	boolean notifyFlag = false;
	public Test(Object lock, boolean notifyFlag) {
		this.lock = lock;
		this.notifyFlag = notifyFlag;
	}
	@Override
	public void run() {
		synchronized (lock) {
			System.out.println((notifyFlag == true ? "(notifyThread)" : "") + Thread.currentThread().getName()
					+ " hava in partA");
			try {
				// Thread.sleep(10000); // A
				if (notifyFlag)
					lock.notifyAll();  // C
				// lock.notify();      // B
				else
					lock.wait();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			System.out.println((notifyFlag == true ? "(notifyThread)" : "") + Thread.currentThread().getName()
					+ " hava in partB");
		}
	}
	public static void main(String[] args) throws InterruptedException {
		Object lock = new Object();
		new Test(lock, false).start();
		new Test(lock, false).start();
		new Test(lock, false).start();
		Thread.sleep(10000);
		new Test(lock, true).start();
	}
}