线程的wait(),notify()例子

package cn.wangy;

class Producer implements Runnable {// 缓冲区内容生产者
	Q q;

	public Producer(Q q) {
		this.q = q;
	}

	public void run() {
		int i = 0;
		while (true) {
			synchronized (q) {//和消费者同步
				if (q.full) {
					try {
						q.wait();
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
				if (i == 0) {
					q.name = "zhangsan";
					q.sex = "male";
				} else {
					q.name = "lisi";
					q.sex = "female";
				}
				q.full = true;
				q.notify();
			}
			i = (i + 1) % 2;
		}
	}
}

class Consumer implements Runnable {
	Q q;

	public Consumer(Q q) {
		this.q = q;
	}

	public void run() {
		while (true) {
			synchronized (q) {
				if (!q.full) {
					try {
						q.wait();
					} catch (Exception e) {}
				}
				System.out.print(q.name);
				System.out.println(" " + q.sex);
				q.full = false;
				q.notify(); // waitnotify语句必须放在synchronized中
			}
		}
	}
}

class Q {
	public String name = "unknown";
	public String sex = "unknown";
	public boolean full = false;
}

public class Threadcommunation{
	public static void main(String[] args){
		Q q = new Q();
		new Thread(new Producer(q)).start(); //传的都是一个q,所以synchronized(q)
		new Thread(newConsumer(q)).start();
	}
}