并发编程。(Concurrent Programming. Using Karel the Robot)

 我在计算机科学课上，我们已经开始使用Karel the Robot作为Java OOP的入门。 我想同时运行两个Karel the Robots，执行两个不同的任务。 我曾尝试在互联网上查找解决方案，并且我已经成功地制作了一个工作线程，但是，我无法同时运行两个Karel the Robots。 任何有关此并发编程问题的帮助将不胜感激。 这是我一直在使用的代码： 
 
package karel;
import kareltherobot.*;
import kareltherobot.Directions;
import kareltherobot.World;
public class KarelSample implements Directions
{
    public static void main(String [] args)  
    {


          Thread Karelrunner = new Thread();
          Karelrunner.start();
 UrRobot Karel = new UrRobot ( 1,5, North, 2);
 Karel.move();
 Karel.move();
 Karel.putBeeper();
 Karel.turnLeft();
 Karel.move();


}




    static
    {   
    World.setVisible(true);
    World.showSpeedControl(true);



}


    class Karelrunner implements Directions {

        UrRobot Karel2 = new UrRobot(8,8, South, 2);
        Karel2.move();
        Karel2.move();
        Karel2.turnLeft();
        Karel2.turnLeft();
        Karel2.putBeeper();
        Karel2.move();
}



}
 
 我还使用了Karel J Robot书籍的例子，其中线程设置代码如下： 
 
public static void main (String [] args)
{ ...

Karelrunner r = new Karelrunner();
World.setupThread(r);

  . . .
}
 
 请以任何方式帮助，我正在尝试制作一个多线程并发程序。 我是新手，感谢您的时间和关注。 

I am in a computer Science class and we have started with using Karel the Robot as the introduction to Java OOP. I want to run two Karel the Robots at the same time, performing two different tasks. I have tried looking up solutions on the internet, and I have been successful in making a working thread, however, I am unable to run two Karel the Robots at the same time. Any help on this Concurrent Programming issue would be appreciated. Here's the code I have been using:
 
package karel;
import kareltherobot.*;
import kareltherobot.Directions;
import kareltherobot.World;
public class KarelSample implements Directions
{
    public static void main(String [] args)  
    {


          Thread Karelrunner = new Thread();
          Karelrunner.start();
 UrRobot Karel = new UrRobot ( 1,5, North, 2);
 Karel.move();
 Karel.move();
 Karel.putBeeper();
 Karel.turnLeft();
 Karel.move();


}




    static
    {   
    World.setVisible(true);
    World.showSpeedControl(true);



}


    class Karelrunner implements Directions {

        UrRobot Karel2 = new UrRobot(8,8, South, 2);
        Karel2.move();
        Karel2.move();
        Karel2.turnLeft();
        Karel2.turnLeft();
        Karel2.putBeeper();
        Karel2.move();
}



}
 
I have also used the Karel J Robot book's example where the thread setup code would be as follows: 
 
public static void main (String [] args)
{ ...

Karelrunner r = new Karelrunner();
World.setupThread(r);

  . . .
}
 
Please help in any way you can, I am trying to make a multi-threaded concurrent program. I am new to this and thanks for your time and attention.

原文：https://stackoverflow.com/questions/12232922