Prob in revalidate()

Question

i m hvng a prob in revalidate() method. I hv a panel over which i am putting some images (in d form of a label) by clicking on that particular image button.After moving the labels on d panel if i click any other button a new label is added but d old label(which was moved) goes bk 2 its initial position...
the code for buttons is as follows:
public void actionPerformed(ActionEvent e)
     String tmp=e.getActionCommand();
if("actor".equals(tmp))
          Icon icon1 = new ImageIcon("..\\uml\\actorfull.gif");
          JLabel label1=new JLabel(icon1);
          dropZone.add(label1);
          dropZone.revalidate();
}

Answer 1

thanx 4 being too rude!!!! that was my 1st post on this site & u hv shown me a good eg of behavior
well for ur refrence if u wud lik 2 help me anymore i m gvng my code
public class Uml extends JFrame implements ActionListener,MouseListener,MouseMotionListener
     Container con;
JPanel p1,p2;
     final JPanel dropZone;
private int xAdjustment;
     private int yAdjustment;
     Component dragComponent;
     int xpoint;
     int ypoint;
Uml()
     con=getContentPane();
     addMouseListener(this);
     addMouseMotionListener(this);
     ImageIcon act = new ImageIcon("..\\uml\\actor4.gif");
     JButton actor = new JButton(act);
     ImageIcon use = new ImageIcon("..\\uml\\usecase.gif");
         JButton usecase = new JButton(use);
actor.setActionCommand("actor");
     actor.addActionListener(this);
     usecase.setActionCommand("usecase");
         usecase.addActionListener(this);
dropZone = new JPanel();
         dropZone.setBorder(BorderFactory.createLineBorder (Color.blue, 2));
           dropZone.setBackground(Color.WHITE);
con.setLayout(new BorderLayout());
     p1.setLayout(new FlowLayout());
     p1.add(actor);
     p1.add(usecase);
con.add(p1,BorderLayout.NORTH);
     con.add(dropZone, BorderLayout.CENTER);
     //setSize(800,570);
     setVisible(true);
public void actionPerformed(ActionEvent e)
     String tmp=e.getActionCommand();
if("actor".equals(tmp))
          Icon icon1 = new ImageIcon("..\\uml\\actorfull.gif");
          JLabel label1=new JLabel(icon1);
          dropZone.add(label1);
          dropZone.revalidate();
}//if
if("usecase".equals(tmp))
          //dropZone.repaint();     
          Icon icon2 = new ImageIcon("..\\uml\\ucase.gif");
          JLabel label2=new JLabel(icon2);
          dropZone.add(label2);
          dropZone.revalidate();                    
}//if
}//actionPerformed
     public void mousePressed(MouseEvent e)
          Container container =  (Container)e.getSource();
          Component component =  container.findComponentAt(e.getX(), e.getY());
          if (component instanceof JPanel) return;
          dragComponent = component;
          xAdjustment = dragComponent.getLocation().x - e.getX();
          yAdjustment = dragComponent.getLocation().y - e.getY();
     **  Move the component around the panel
     public void mouseDragged(MouseEvent e)
          if (dragComponent == null) return;
          dragComponent.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
     **  Deselect the component
     public void mouseReleased(MouseEvent e)
          dragComponent = null;
     public void mouseClicked(MouseEvent e) {}
     public void mouseMoved(MouseEvent e) {}
     public void mouseEntered(MouseEvent e) {}
     public void mouseExited(MouseEvent e) {}
public static void main(String args[])
     Toolkit kit = Toolkit.getDefaultToolkit();
     Dimension screenSize = kit.getScreenSize();
     int screenWidth = screenSize.width;
     int screenHeight = screenSize.height;
     Uml obj=new Uml();     
     obj.setBounds(0, 0, screenWidth, screenHeight-29);
     obj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}//class