同步两个线程
问题描述：
我有两个线程，我希望第二个线程等待第一个线程完成.我怎样才能做到这一点?
I have two threads and I want the second thread to wait until first thread finishes. How can I accomplish this?
这是我的代码:
public class NewClass1 implements Runnable {
// in main
CallMatlab c = new CallMatlab();
CUI m = new CUI();
Thread t1 = new Thread(c);
t1.start();
Thread t2 = new Thread(m);
try {
t1.join();
} catch (InterruptedException ex) {
Logger.getLogger(NewClass1.class.getName()).log(Level.SEVERE, null, ex);
}
t2.start();
//
public void run() {
throw new UnsupportedOperationException("Not su..");
}
}
答
使用 Thread.join() 方法.从第二个线程，调用
Use the Thread.join() method. From the second thread, call
firstThread.join();
有一些可选的重载也需要超时.您需要处理 InterruptedException，以防您的第二个线程在第一个线程完成之前中断.
There are optional overloads which take timeouts, too. You'll need to handle InterruptedException in case your second thread is interrupted before the first thread completes.