Java-- join源代码测试，java--join源代码,public class

Java-- join源代码测试，java--join源代码,public class

public class JoinTest {    public static void main(String[] args) {        // TODO Auto-generated method stub        Thread t1 = new ThreadA();//利用多态实例化一个A线程        Thread t2 = new ThreadB(t1);//利用多态实例化一个B线程        t1.start();        t2.start();    }}/*继承于Thread的子类*/class ThreadA extends Thread {    public void run() {        for (int i = 1; i <= 20; i++) {            System.out.println(i + "  ￥￥￥");            try {                Thread.sleep(1000);            } catch (InterruptedException e) {            }        }    }}/*继承于Thread的子类*/class ThreadB extends Thread {    private Thread t;    public ThreadB() {    }    public ThreadB(Thread t) {        this.t = t;    }    public void run() {        for (int i = 1; i <= 20; i++) {            System.out.println(i + "  ###");            try {                Thread.sleep(1000);                if (i == 10) {                    t.join();// join 使这两个线程进入串行状态（也就是说t突然插了进来，必须等t执行完毕之后，才会让B线程继续执行）                }            } catch (InterruptedException e) {            }        }    }}