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

public class HelloWorldSwing implements ActionListener {
private static String labelPrefix = "Number of button clicks: ";
private int numClicks = 0;
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private void createAndShowGUI() {
        //JFrame.setDefaultLookAndFeelDecorated(true);

        JFrame frame = new JFrame("HelloWorldSwing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	JButton button = new JButton("I'm a Swing button!");
        button.addActionListener(this);
	frame.getContentPane().add(button);
        JLabel label = new JLabel("Hello World");
        frame.getContentPane().add(label);
        frame.pack();
        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        numClicks++;
        //label.setText(labelPrefix + numClicks);
   }

    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();
            }
        });
    }
}