join示例分析

join示例分析

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");
        }
    }
}