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

class Ex5 {

  // Screen is divided into many pixels
  // Pixel is a unit of drawing
  final static int XPIXELS = 800;
  final static int YPIXELS = 600;

  static JLabel msg;
  static int numClicks = 0;

  public static void main(String[] args) {

    // JFrame is a predefined class
    JFrame jf = new JFrame("Example-5 in Java GUI");

    // What to do when window is closed?
    jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // Set the size of the window (in terms of pixels)
    jf.setSize(new Dimension(XPIXELS, YPIXELS));

    // Create components
    Container con = jf.getContentPane();
    // Create a panel
    JPanel p1 = new JPanel();

    //p1.setBackground(Color.YELLOW);
    p1.setBackground(new Color((float)0.8, (float)1.0, (float)0.8));
    p1.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    p1.setLayout(new BoxLayout(p1, BoxLayout.Y_AXIS));
    p1.add(Box.createRigidArea(new Dimension(100, 50)));

    // Create a label
    JLabel label = new JLabel("Example-5");
    p1.add(label);
    // Create a button
    JButton btn = new JButton("Click-me");
    p1.add(btn);
    // Add the msg label
    msg = new JLabel();
    p1.add(msg);
    msg.setText("Number of clicks is "+numClicks);

    btn.addActionListener(new ClickListener());

    con.add(p1);

    // Show the frame
    jf.setVisible(true);

    // Note: main does not exit here

  } // End main()

}