package org.cp;
/**
* 继承方式线程
* 同步方法 线程安全
* create by CP on 2019/7/25 0025.
*/
public class Window1_2 extends Thread {
private static int ticket = 100;
private static Object o = new Object();
@Override
public void run() {
while (true) {
if (sell()) {
break;
}
}
}
/**
* 这里要声明静态，要不然锁不唯一
* @return boolean
*/
private synchronized static boolean sell() {
if (ticket>0) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+ ": "+ticket);
ticket--;
} else {
return true;
}
return false;
}
}
class WindowTest1_2 {
public static void main(String[] args) {
Window1_2 window1 = new Window1_2();
Window1_2 window2 = new Window1_2();
Window1_2 window3 = new Window1_2();
window1.setName("窗口1 ");
window2.setName("窗口2 ");
window3.setName("窗口3 ");
window1.start();
window2.start();
window3.start();
}
}