/**
* 使用同步方法解决实现Runnable接口的线程安全问题
*
*
* 关于同步方法的总结:
* 1. 同步方法仍然涉及到同步监视器,只是不需要我们显式的声明。
* 2. 非静态的同步方法,同步监视器是:this
* 静态的同步方法,同步监视器是:当前类本身
*
*/
class Window3 implements Runnable {
private int ticket = 100;
@Override
public void run() {
while (true) {
show();
}
}
private synchronized void show(){//同步监视器:this
//synchronized (this){
if (ticket > 0) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName() + ":卖票,票号为:" + ticket);
ticket--;
}
//}
}
}
public class WindowTest3 {
public static void main(String[] args) {
Window3 w = new Window3();
Thread t1 = new Thread(w);
Thread t2 = new Thread(w);
Thread t3 = new Thread(w);
t1.setName("窗口1");
t2.setName("窗口2");
t3.setName("窗口3");
t1.start();
t2.start();
t3.start();
}
}