线程安全方式1Thread类---同步方法

1.继承Thread类的方式---同步方法（以卖票为例）

/**
 * 基于Thread类的线程安全问题1---同步方法
 *
 * @Author: ITYW
 * @Create 2020 - 10 - 26 - 18:16
 */
public class ThreadSecurity {
    public static void main(String[] args) {
        Thread_Security t1 = new Thread_Security();
        Thread_Security t2 = new Thread_Security();
        Thread_Security t3 = new Thread_Security();

        t1.setName("window1");
        t2.setName("window2");
        t3.setName("window3");

        t1.start();
        t2.start();
        t3.start();
    }
}
class Thread_Security extends Thread{
    private static int ticket = 10000;
    @Override
    public void run() {
        while (true) {
            sale();
        }
    }
    public static synchronized void sale(){
                if (ticket > 0) {
                    System.out.println(Thread.currentThread().getName() + "卖出第" + ticket + "张");
                    ticket--;
                }


    }
}