线程安全方式1Thread类---同步代码块

/**
 * 基于Thread类的线程安全问题1---同步代码块方式
 *
 * @Author: ITYW
 * @Create 2020 - 10 - 26 - 18:35
 */
public class ThreadSecurity02 {
    public static void main(String[] args) {
        Thread_Security02 t1 = new Thread_Security02();
        Thread_Security02 t2 = new Thread_Security02();
        Thread_Security02 t3 = new Thread_Security02();

        t1.setName("窗口1");
        t2.setName("窗口2");
        t3.setName("窗口3");

        t1.start();
        t2.start();
        t3.start();

    }
}
class Thread_Security02 extends Thread{
    private static int ticket = 100;
    @Override
    public void run() {
        while (true){
            synchronized (Thread_Security02.class){
                if (ticket > 0){
                    System.out.println(Thread.currentThread().getName()+"卖出了第"+ticket+"张");
                    ticket--;
                }else {
                    break;
                }
            }
        }
    }
}