import javax.swing.*;
import java.awt.*;
 
public class Pbutton extends JButton
{
  int x,y;
}

import javax.swing.*; 
class Testicon extends JFrame 
{ 
    ImageIcon icon = new ImageIcon("new.gif"); 
     
    Pbutton j = new Pbutton(); 
     
    //Pbutton j = new Pbutton("直接setText不行"); 
    //Pbutton j = new Pbutton(icon); //直接setIcon也不行 
     
    Testicon() 
    { 
        j.setIcon (icon);//这里可以 
         
        this.add(j); 
         
        this.setSize(200,100); 
        this.setVisible(true); 
         
        j.x=0; 
        j.y=100; 
        System.out.println ("按钮的赋值x= "+j.x+" 按钮的赋值y="+j.y); 
         
    } 
    public static void main(String args[]) 
    { 
        Testicon my = new Testicon(); 
        my.j.setText ("这个可以"); 
    } 
}