How to have a button remove itself when clicked?

Question

Here is my code...it should technically work, shouldn't it? Yet when you try it out and click the first button it will fail to refresh or update the frame. When I resize the frame after clicking the first button, the three buttons that were there before disappear and the new button appears. What can I do to fix this? Please help, try it out for yourself and see.
Also, if you can explain to me, how can I center these buttons all to the right?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CPT extends JPanel implements ActionListener
protected JButton AddEntryButton, ViewEntriesButton, SearchEntriesButton, AddButton;
private final static String newline = "\n";
public CPT ()
super (new GridLayout (10, 10));
AddEntryButton = new JButton ("Add Entry");
AddEntryButton.setVerticalTextPosition (AbstractButton.TOP);
AddEntryButton.setHorizontalTextPosition (AbstractButton.LEFT);
AddEntryButton.setToolTipText ("Click this button to add a database entry.");
AddEntryButton.setMnemonic (KeyEvent.VK_A);
AddEntryButton.setActionCommand ("AddEntry");
AddEntryButton.addActionListener (this);
ViewEntriesButton = new JButton ("View Entries");
ViewEntriesButton.setVerticalTextPosition (AbstractButton.CENTER);
ViewEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
ViewEntriesButton.setToolTipText ("Click this button to add view all database entries.");
ViewEntriesButton.setMnemonic (KeyEvent.VK_V);
ViewEntriesButton.setActionCommand ("ViewEntries");
ViewEntriesButton.addActionListener (this);
SearchEntriesButton = new JButton ("Search Entries");
SearchEntriesButton.setVerticalTextPosition (AbstractButton.BOTTOM);
SearchEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
SearchEntriesButton.setToolTipText ("Click this button to search through all database entries.");
SearchEntriesButton.setMnemonic (KeyEvent.VK_S);
SearchEntriesButton.setActionCommand ("SearchEntries");
SearchEntriesButton.addActionListener (this);
AddButton = new JButton ("Add");
AddButton.setVerticalTextPosition (AbstractButton.TOP);
AddButton.setHorizontalTextPosition (AbstractButton.RIGHT);
AddButton.setToolTipText ("Click this button to add a database entry.");
AddButton.setMnemonic (KeyEvent.VK_A);
AddButton.setActionCommand ("Add");
AddButton.addActionListener (this);
add (AddEntryButton);
add (ViewEntriesButton);
add (SearchEntriesButton);
public void actionPerformed (ActionEvent e)
if ("AddEntry".equals (e.getActionCommand ()))
remove (AddEntryButton);
remove (ViewEntriesButton);
remove (SearchEntriesButton);
add (AddButton);
if ("ViewEntries".equals (e.getActionCommand ()))
remove (AddEntryButton);
remove (ViewEntriesButton);
remove (SearchEntriesButton);
if ("SearchEntries".equals (e.getActionCommand ()))
remove (AddEntryButton);
remove (ViewEntriesButton);
remove (SearchEntriesButton);
// Create the GUI and show it. For thread safety,
// this method should be invoked from the
// event-dispatching thread.
private static void createAndShowGUI ()
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated (true);
//Create and set up the window.
JFrame frame = new JFrame ("Swisha Computer House");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new CPT ();
newContentPane.setOpaque (true); //content panes must be opaque
frame.setContentPane (newContentPane);
//Display the window.
frame.pack ();
frame.setSize (300, 300);
frame.setVisible (true);
public static void main (String[] args)
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater (new Runnable ()
public void run ()
createAndShowGUI ();
}

Answer 1

You should tell the container it needs to be layed out again and then request for a UI update.
Your first clause in actionPerformed:
if ("AddEntry".equals (e.getActionCommand ()))
  remove (AddEntryButton);
  remove (ViewEntriesButton);
  remove (SearchEntriesButton);
  add (AddButton);
}would then be:
if ("AddEntry".equals (e.getActionCommand ()))
  remove (AddEntryButton);
  remove (ViewEntriesButton);
  remove (SearchEntriesButton);
  add (AddButton);
  invalidate();
  updateUI();
}The same applies for the two other clauses, resulting in:
public void actionPerformed(ActionEvent e)
   if ("AddEntry".equals(e.getActionCommand()))
      remove(AddEntryButton);
      remove(ViewEntriesButton);
      remove(SearchEntriesButton);
      add(AddButton);
      invalidate();
      updateUI();
   if ("ViewEntries".equals(e.getActionCommand()))
      remove(AddEntryButton);
      remove(ViewEntriesButton);
      remove(SearchEntriesButton);
      invalidate();
      updateUI();
   if ("SearchEntries".equals(e.getActionCommand()))
      remove(AddEntryButton);
      remove(ViewEntriesButton);
      remove(SearchEntriesButton);
      invalidate();
      updateUI();
}