在线程休眠时执行 main class - java

Question

谁能帮我理解线程在 java 中的工作原理。

我有一个主class:

public static void main(String[] args) {
    Runnable r = new TestThread();
    new Thread(r).start();
    executor.execute(r);
    System.out.println("Hey the thread has ended")
}

和一个线程class：

public class TestThread implements Runnable {
    public class TestThread() {
        sleep(20000);
    }

    @Override
    public void run() {
    // TODO Auto-generated method stub
    }

}

我怎样才能得到短语："Hey the thread has ended"而不必在线程休眠时等待？

Answer 1

你可以这样做：调用线程class的start方法，在运行实现中让线程休眠...

请注意，您的应用程序将在线程 returns 进入睡眠状态之前终止并继续

运行启用class

    public class TestThread implements Runnable {

    @Override
    public void run() {
        // TODO Auto-generated method stub
        try {
            Thread.sleep(20000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void setParameter(String string) {
        // TODO Auto-generated method stub

    }
}

实施

 public static void main(String[] args) {
    TestThread r = new TestThread();
    r.setParameter("myParameterHere");
    Thread t = new Thread(r);
    t.setName("asdas");
    t.start();
    System.out.println("Hey the thread has ended");
}

Answer 2

这是可以说是最简单的形式。

public class TestThread implements Runnable {

    @Override
    public void run() {
        try {
            Thread.sleep(20000);
        } catch (InterruptedException ex) {
        }

    }

}

public void test() throws InterruptedException {
    Runnable r = new TestThread();
    Thread t = new Thread(r);
    t.start();
    // No it hasn't!
    //System.out.println("Hey the thread has ended");
    t.join();
    // It has now!
    System.out.println("Hey the thread has ended");
}

在线程休眠时执行 main class - java

Executing main class while thread sleeps - java

java

multithreading

java-threads

运行启用class

实施