Join(强制执行)

Join合并线程，待此线程执行完成后，再执行其他线程，其他线程阻塞

//测试Join，插队
public class TestJoin implements Runnable{

    @Override
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println("线程vip来了" + i);
        }
    }

    public static void main(String[] args) throws InterruptedException {

        //启动线程
        TestJoin testJoin = new TestJoin();
        Thread thread = new Thread(testJoin);
        thread.start();

        //主线程
        for (int i = 0; i < 500; i++) {
            if (i == 200){
                thread.join();//插队
            }
            System.out.println("main" + i);
        }
    }
}