import javax.swing.*;
 import java.awt.*;
 import javax.swing.event.*;
 import java.awt.event.*;


 public class MyFrame extends JFrame implements ActionListener {    // inherit JFrame

    private JButton clickme = new JButton("Click Me");   // declare and create a button

 /**
  * Constructor sets up the window and creates a toolbar
  */
    public MyFrame() {
 //
 // setup the frames banner/title bar
 //
      super("My Frame");  // call JFrame's constructor and give it a title
      setSize(300,200);  // set the width of the window to 300 pixels, height to 200.
  //    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // exit the whole program when this frame is closed
  addWindowListener(new WindowAdapter() {      // Quit the application
              public void windowClosing(WindowEvent e) {
                  System.exit(0);
              }
        });
 //
 // Add the button to the frame's content pane
 //
    getContentPane().add("Center",clickme);   // tell the content pane to add the ClickMe button
    clickme.addActionListener(this);   // teel the clickme button to send ActionEvents back to this object.
   }
 /**
  *  This method is invoked whenever an ActionEvent is sent to this class
  *  Note: more than one component could have sent the event, therefore the
  *  code checks the identity of the source of the event.
  */
 public void actionPerformed(ActionEvent e) {

   if(e.getSource() == clickme) {
      System.out.println("Clickme was clicked");
   }

 }
 /***********************************************************************
  *
  *  Main routine, Note, this routine can be in any class.
  */
   public static void main(String[] arguments){

     MyFrame fr = new MyFrame();  // create the frame
     fr.setVisible(true);         // allow it to be seen

   }
 }