DELEGATION MODEL

9. Java Program to Create and Switch between Frames using Buttons

            import java.awt.*;
            import java.awt.event.*;
            class Frame1 extends Frame
                {
                    private Button btn = new Button("Change Frame");
                    Label l = new Label("This is 1st Frame.");
                    Frame1()
                    {
                        setBounds(100,100,400,400);
                        setLayout(new FlowLayout(FlowLayout.LEFT));
                        add(l);
                        add(btn);
                        btn.addMouseListener(new MouseAdapter() {
                            public void mouseClicked(MouseEvent e)
                            {
                                new Frame2();
                            }
                        });
                        addWindowListener(new WindowAdapter() {
                            public void windowClosing(WindowEvent e)
                            {
                                System.exit(0);
                            }
                        });
                        setVisible(true);
                    }
                }
                class Frame2 extends Frame
                {
                    private Button btn = new Button("Change Frame");
                    Label l = new Label("This is 2nd Frame.");
                    Frame2()
                    {
                        setBounds(100,100,400,400);
                        setLayout(new FlowLayout(FlowLayout.LEFT));
                        add(l);
                        add(btn);
                        btn.addMouseListener(new MouseAdapter() {
                            public void mouseClicked(MouseEvent e)
                            {
                                new Frame1();
                            }
                        });
                        addWindowListener(new WindowAdapter() {
                            public void windowClosing(WindowEvent e)
                            {
                                System.exit(0);
                            }
                        });
                        setVisible(true);
                    }
                }
            class Main
                {
                    public static void main(String[] args) {
                        new Frame1();
                    }
                }
        

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