תכנית לדוגמא

class LWButton extends Component {
  Declare instance variables:
    label //self-explanatory
    pressed //toggles true or false when LWButton is pressed
    actionListener //refers to a list of registered ActionListener objects

  LWButton();//constructs an LWButton with no label
  LWButton(String);//constructs an LWButton with a label
  
  //Add to or remove from a list of registered ActionListener objects
  public void addActionListener(ActionListener listener)
  public void removeActionListener(ActionListener listener)

  //Prepare to modify the appearance of the LWButton object and 
  // dispatch an ActionEvent object when the LWButton is pressed by 
  // the user. Invoke repaint() method.
  public void processMouseEvent(MouseEvent e)
  
  //Set the label after LWButton is instantiated
  public void setLabel(String label) 
  
  //Overridden paint method deals with the appearance of the LWButton
  // based on whether it is currently "pressed" or "not pressed".
  public void paint(Graphics g)
  
  //This method is supposed to determine if a mouse event is inside the
  // LWButton component.  However, as of 3/21/97, there is a vertical 
  // offset error in the Win95 implementation of JDK 1.1 and this method
  // returns true if the mouse is outside but below the object.  It
  // returns false if the mouse is inside near the top of the object.
  // Otherwise, it seems to work OK.
  // NOTE: THE PROBLEM DESCRIBED ABOVE SEEMS TO HAVE BEEN RESOLVED IN
  // JDK 1.1.3.

  public boolean contains(int x, int y)
  
  //Provide preferred size and minimum size of LWButton
  public Dimension getPreferredSize()
  public Dimension getMinimumSize() 

}//end class LWButton