线程休眠时执行主类 - java

Question

有人可以帮助我理解线程如何在java中运行。

我有一个主要课程：

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")
}

和一个线程类：

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

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

}

我怎样才能得到这句话：＆＃34;嘿线程已经结束＆＃34;无需等待线程休眠？

Answer 1

你可以这样做： 调用线程类的start方法，并在Run实现中使线程休眠...

请注意，您的应用将在线程从睡眠状态返回之前终止

Runnable类

    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

这可以说是最简单的形式。

gradeWeight = new Array(5);
    gradeWeight[1] = 12;
    gradeWeight[2] = 18;
    gradeWeight[3] = 20;
    gradeWeight[4] = 20;
    gradeWeight[5] = 20;