DELEGATION MODEL

17. Java Program to Change the Applet Background Colour when Button Clicked

            import java.awt.*;
            public class ButtonWithBorderApp extends Frame {
            
                public ButtonWithBorderApp() {
                    // Set up the frame
                    setTitle("Button with Border Example");
                    setSize(300, 200);
                    setLayout(new FlowLayout());
            
                    // Create a Panel to act as a border for the button
                    Panel buttonPanel = new Panel();
                    buttonPanel.setLayout(new FlowLayout());
                    buttonPanel.setBackground(Color.BLACK); // Border color
                    buttonPanel.setSize(100, 50);
            
                    // Create the Button
                    Button button = new Button("Push Me");
                    button.setBackground(Color.LIGHT_GRAY);
                    button.setPreferredSize(new Dimension(80, 30)); // Inner button size
            
                    // Add the button to the panel (creates a border effect)
                    buttonPanel.add(button);
            
                    // Add the panel (with button inside) to the frame
                    add(buttonPanel);
            
                    // Set up close operation
                    addWindowListener(new java.awt.event.WindowAdapter() {
                        public void windowClosing(java.awt.event.WindowEvent windowEvent) {
                            System.exit(0);
                        }
                    });
                }
            
                public static void main(String[] args) {
                    // Create and show the frame
                    ButtonWithBorderApp app = new ButtonWithBorderApp();
                    app.setVisible(true);
                }
            }

OUTPUT

push