相关疑难解决方法(0)

简单地等待所有线程进程完成的方法是什么？例如,假设我有:

public class DoSomethingInAThread implements Runnable{

    public static void main(String[] args) {
        for (int n=0; n<1000; n++) {
            Thread t = new Thread(new DoSomethingInAThread());
            t.start();
        }
        // wait for all threads' run() methods to complete before continuing
    }

    public void run() {
        // do something here
    }


}

我如何改变这一点,以便main()方法在注释处暂停,直到所有线程的run()方法都退出？谢谢!