Java-- join源代碼測試

public class JoinTest {


public static void main(String[] args) {
    // TODO Auto-generated method stub
    Thread t1 = new ThreadA();//利用多態實例化一個A線程
    Thread t2 = new ThreadB(t1);//利用多態實例化一個B線程
    t1.start();
    t2.start();
}


}
/繼承于Thread的子類/
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) {
            }
        }
    }
}
/繼承于Thread的子類/
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 使這兩個線程進入串行狀態（也就是說t突然插了進來，必須等t執行完畢之后，才會讓B線程繼續執行）
            }
        } catch (InterruptedException e) {
        }
    }
}

}</pre>