import java.awt.*; import javax.swing.*; import java.awt.event.*;
   public class TelephoneSet extends TestGridLayout
   							implements ActionListener{
   	  JTextField display = new JTextField();
      public TelephoneSet() {
         setTitle("Border Layout Test.");
         JPanel jp1 = panel; //(JPanel)getContentPane();
         jp1.add(new JButton("Cancel")); 
      	 JPanel jp2 = new JPanel();
         jp2.setLayout(new BorderLayout());

         jp2.add(display, "North");

         jp2.add(jp1);
         setContentPane(jp2);
                 
         Component components[] = jp1.getComponents();
         for(int i=0;i<components.length; i++){
           if(components[i] instanceof JButton)
                ((JButton)components[i]).addActionListener(this);
         }

         setVisible(true);
      }
      
      public void actionPerformed(ActionEvent ae) {
        if (ae.getActionCommand().equals("Cancel"))
           display.setText("");
        else
           display.setText(display.getText()+ae.getActionCommand());
     }
 
      public static void main(String args [] ) {
         new TelephoneSet();
      }
   }