带多线程的JApplet

我尝试从一个类创建两个移动对象。我想控制它们，但JApplet不打开线程。带多线程的JApplet

我的代码：

import java.awt.Graphics; 
import javax.swing.JApplet; 

class RunnableThread extends JApplet implements Runnable{ 

    Thread runner; 
    String name; 

    public RunnableThread(String namex){ 
     name=namex; 
    }  

    public void init(){ 
     setSize(200,300); 
    } 

    public void paint(Graphics g){ 
     g.drawLine(20, 20, 50, 50); 
    } 

    public void run(){ 
     System.out.println("test"+name);    
    }  
} 


import java.util.logging.Level; 
import java.util.logging.Logger; 


public class RunnableTest{  
    public static void main(String args[]){ 
    RunnableThread bt1=new RunnableThread("test 1"); 
    RunnableThread bt2=new RunnableThread("test 2");  
    Thread btt1=new Thread(bt1); 
    Thread btt2=new Thread(bt2); 
    btt2.start(); 
    btt1.start();  
    } 
}

来源

2012-05-22 a s