import java.awt.BorderLayout;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class KeyEventClass implements KeyListener {
    
    public KeyEventClass(){
        init();
    }
    
    private void init() {
        JTextField field = new JTextField();
        field.addKeyListener(this);
        JFrame frame = new JFrame("Key-Event");
        frame.setLayout(new BorderLayout());
        frame.add(field, BorderLayout.CENTER);
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public void keyTyped(KeyEvent e) {
        System.out.println("KeyTyped: ");
        if(e.getKeyChar() == KeyEvent.CHAR_UNDEFINED){
            System.out.println("Kein Unicode-Character gedr\u00FCckt!");
        }else{
            System.out.println(e.getKeyChar() + " gedr\u00FCckt!");
        }
        System.out.println("---");
    }
    public void keyPressed(KeyEvent e) {
        System.out.println("Taste: " + e.getKeyChar() + ", Code: " + e.getKeyCode());
        System.out.println("Tastenposition: " + e.getKeyLocation());
        System.out.println("---");
    }

    public void keyReleased(KeyEvent e) {
        System.out.println("KeyReleased: ");
        if(e.getKeyCode() == KeyEvent.VK_SPACE){
            System.out.println("Programmabbruch!");
            System.exit(0);
        }    
        System.out.println("Taste: " + e.getKeyChar() + ", Code: " + e.getKeyCode());
        System.out.println("---");
    }
    
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new KeyEventClass());
    }
}