public class TestJoin {

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

        System.err.println(Thread.currentThread().getName()+"...start");

        JoinThread t1 = new JoinThread("t1");

        t1.start();

        System.err.println(Thread.currentThread().getName()+"...t1.join... wait t1 died.");

        t1.join();//让t1加入到当前线程main,然后main线程进入阻塞状态,直到t1执行run完成

        System.err.println(Thread.currentThread().getName()+"....end");

    }

    static class JoinThread extends Thread {

        public JoinThread(String name) {

            super(name);

        }

        @Override

        public void run() {

            System.err.println(Thread.currentThread().getName()+"....run start");

            for (int i = 0; i < 5; i++) {

                try {

                    System.err.println(Thread.currentThread().getName()+"..."+i);

                    Thread.sleep(500);

                } catch (InterruptedException e) {

                    e.printStackTrace();

                }

            }

            System.err.println(Thread.currentThread().getName()+"........run end");

        }

    }

}