DELEGATION MODEL

5. Java Program to Handle KeyBoardEvent

            import java.awt.*;
            import java.awt.event.*;
            class KeyBoardEvent extends Frame
                {
                    TextField tf = new TextField(10);
                    private Label l = new Label();
                    KeyBoardEvent()
                    {
                        setBounds(100,100,400,400);
                        setLayout(new FlowLayout(FlowLayout.LEFT));
                        add(tf);
                        add(l);
                        tf.addKeyListener(new KeyListener() {
                            public  void keyTyped(java.awt.event.KeyEvent e)
                            {
                                l.setText("Key Typed");
                            }
                            public  void keyPressed(java.awt.event.KeyEvent e)
                            {
                                l.setText("Key Pressed");
                            }
                            public  void keyReleased(java.awt.event.KeyEvent e)
                            {
                                l.setText("Key Released");
                            }
                        });
                        addWindowListener(new WindowAdapter() {
                            public void windowClosing(WindowEvent e)
                            {
                                System.exit(0);
                            }
                        });
                        setVisible(true);
                    }
                }
            class Main
                {
                    public static void main(String[] args) {
                        new KeyBoardEvent();
                    }
                }
        

OUTPUT