- 线程A执行thread.join()，表示A等待thread线程终止之后才从thread.join()返回
- join(long millis)和join(long millis, int nanos)使其具有超时特性
代码示例：
import java.util.concurrent.TimeUnit;
/**
* 创建10个线程，每个线程等待前一个线程的join()方法，0号线程等待main结束
*
* @author pengjunzhe
*/
public class Join {
public static void main(String[] args) throws InterruptedException {
Thread previous = Thread.currentThread();
for (int i = 0; i < 5; i++) {
Thread thread = new Thread(new Domino(previous), String.valueOf(i));
thread.start();
previous = thread;
}
TimeUnit.SECONDS.sleep(3);
System.out.println(Thread.currentThread().getName() + " terminate.");
}
static class Domino implements Runnable {
private Thread thread;
public Domino(Thread thread) {
this.thread = thread;
}
@Override
public void run() {
try {
thread.join();
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName() + " terminate.");
}
}
}
输出结果：
main terminate.
0 terminate.
1 terminate.
2 terminate.
3 terminate.
4 terminate.
