信号灯法
package com.test3;
public class TestPC2 {
public static void main(String[] args) {
TV tv = new TV();
new Player(tv).start();
new Watcher(tv).start();
}
}
class Player extends Thread {
TV tv;
public Player(TV tv) {
this.tv = tv;
}
@Override
public void run() {
for (int i = 0; i < 20; i++) {
if (i % 2 == 0) {
this.tv.play("快乐大本营");
} else {
this.tv.play("广告");
}
}
}
}
class Watcher extends Thread {
TV tv;
public Watcher(TV tv) {
this.tv = tv;
}
@Override
public void run() {
for (int i = 0; i < 20; i++) {
this.tv.watch();
}
}
}
class TV {
String voice;
boolean flag = true;
public synchronized void play(String voice) {
if (!flag) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("演员表演了:" + voice);
this.notifyAll();
this.voice = voice;
this.flag = !flag;
}
public synchronized void watch() {
if (flag) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("观看了:" + voice);
this.notifyAll();
this.flag = !flag;
}
}