The glass pane in Java

 /**
  * Glass pane class
  * The glass pane is displayed overlap the content
  * pane in the japplet or jframe. It can be set to
  * visible while user want to temporarily disable
  * their window.
  *
  * Usage:
  * 
  * //In your frame's initialization, set the glass pane.
  * this.setGlassPane(new GlassPane());
  *
  * //In your event, make the glass pane visible.
  * this.getGlassPane().setVisible(true);
  * new Thread(){
  *  public void run(){
  *   //Your program code
  *   ...................
  *   SwingUtilities.invokeLater(new Runnable(){
  *    public void run(){
  *     XXXX.this.getGlassPane().setVisible(false);
  *    }
  *   });
  *  }
  * }.start();
  * 
  *
  */
 public class GlassPane extends JComponent implements MouseListener, KeyListener{
  /** Serial version ID */
  private static final long serialVersionUID = -5955027767708857008L;
  
  /** Label to display message */
  private JLabel lblmsg = null;
  /** Glass pane's color */
  private Color glassColor = null;
  
  /**
   * constructor
   * 
   */
  public GlassPane(){
   addMouseListener(this);
   addKeyListener(this);
   setOpaque(false);
   
   //Get glass pane's color
   Color base = UIManager.getColor("OptionPane.background");
   glassColor = new Color(base.getRed(), base.getGreen(), base.getBlue(), 128);

   setLayout(new GridBagLayout());
   
   lblmsg = new JLabel("aaaaaaaaa");
   lblmsg.setHorizontalAlignment(SwingConstants.CENTER);
   lblmsg.setOpaque(true);
   
   this.add(lblmsg);
  }
  
  //Mask mouse and keyboard event
  public void mouseEntered(MouseEvent e){}
  public void mouseExited(MouseEvent e){}
  public void mousePressed(MouseEvent e){}
  public void mouseReleased(MouseEvent e){}
  public void mouseClicked(MouseEvent e){}
  public void keyPressed(KeyEvent e){e.consume();}
  public void keyReleased(KeyEvent e){e.consume();}
  public void keyTyped(KeyEvent e){}
  
  /**
   * Show or hide glass pane
   * 
   */
  public void setVisible(boolean fl){
   super.setVisible(fl);
   if(fl){
    requestFocusInWindow();
    setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
   }else{
    setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
   }
  }

  /**
   * Drawing glass pane's background
   * 
   */
  protected void paintComponent(Graphics g){
   g.setColor(glassColor);
   g.fillRect(0, 0, getSize().width, getSize().height);
  }
 }