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How to delete JButton on JPanel dynamically?

   I dynamically add several JButton Objects in a ArrayList by other codes. After that,what  I want to implement is :When a JButton on the JPanel is clicked, the second element in the arraylist will be removed. Then I repaint the other elements on JPanel, the second JButton should disappeare,  but the code as following does not work.
   Would you show me the right codes? Thank you in advance!


import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;

public class DelJComponent extends JApplet {
     
    JP jp=new JP();
    ArrayList StepCollection=new ArrayList();
   
     public void init()
     {
         getContentPane().add(jp);
          for (int i=0;i<3;i++)
               {   StepNode stepObj=new StepNode();
                    StepCollection.add(stepObj);
               }
         
     }
     class JP extends JPanel
     {
          JP()
          {
          }
          public void paint(Graphics g)
          {
               super.paint(g);
               for (int i=0;i<StepCollection.size();i++)
                    {
                      StepNode tempObj=(StepNode)StepCollection.get(i);
                        add(tempObj);
                        tempObj.setLocation(25*i+50,25*i+50);
                    }
               g.drawString(Integer.toString(StepCollection.size()),30,10);
          }
     }    
     class StepNode extends JButton
     {
          StepNode()
          {
               setSize(new Dimension(30,20));
               addMouseListener(new StepMouseProcess());
          }
          public void delStep()
          {
               StepCollection.remove(2);//2 is for test
               jp.validate();
               jp.repaint();
          }
         private class StepMouseProcess extends MouseAdapter
         {
               public void mouseClicked(MouseEvent e)
               {
                        delStep();
                 }
            }          

     }

}

0
CFree
Asked:
CFree
  • 2
1 Solution
 
raid999Commented:
I have done a similar programe
Have a look at this
ftp://80.195.36.75/Raid/MSc/JAVA/Resturant
and then download the zip file.
0
 
CFreeAuthor Commented:
raid999 : there is some difference between our codes.you delete the JButton by JPanel's mumber function "remove",but I want to delete the element in ArrayList then show the left on the JPanel.
0
 
raid999Commented:
right sorry mate i will try to think of your way and if i come to any thing i will let you know.

_________________________
cheers
0

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