线程一-------经典案例买票

/*
 * extends THread也可以  不过都是使用下列方法
 */
public class MyThread implements Runnable {
	 private int ticket = 5;  //5张票

	    public void run() {
	        for (int i=0; i<=20; i++) {
	            if (this.ticket > 0) {
//						Thread.sleep(3000);//休眠3秒
	            	//得到线程的名字
						System.out.println(Thread.currentThread().getName()+ "正在卖票      "+this.ticket--);
	            }
	        }
	    }

	    @SuppressWarnings("static-access")
		public static void main(String [] args) throws Exception {
	       MyThread my = new MyThread();
	       Thread t = new Thread(my, "1号窗口");
	       //线程是否开启
	       System.out.println(t.isAlive()+" 线程");
//	       Thread.sleep(3000);
	       t.start();
	       t.yield();
	       System.out.println(t.isAlive()+" 线程");

	        new Thread(my, "2号窗口").start();
	        new Thread(my, "3号窗口").start();
	    }
}