KeyEventHandler.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class KeyEventHandler extends JFrame{
    JTextField jtf;
    JLabel label;
    public KeyEventHandler(){
        setSize(400,300);
        setTitle("KEY EVENTS!");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
        label = new JLabel("Key Event: ");
        add(label);
        jtf = new JTextField(20);
        add(jtf);
        jtf.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e)
            {
                label.setText("Key pressed:"+KeyEvent.getKeyText(e.getKeyCode()));
            }
            public void keyReleased(KeyEvent e)
            {
                label.setText("Key Released:"+KeyEvent.getKeyText(e.getKeyCode()));
            }
            public void keyTyped(KeyEvent e)
            {
                label.setText("Key Typed:"+String.valueOf(e.getKeyChar()));
            }    
        });
    }
    public static void main(String[] args) {
        KeyEventHandler keh = new KeyEventHandler();
        keh.setVisible(true);
    }
}