Java tutorial
import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JTextField; public class Main { public static void main(String[] argv) throws Exception { JTextField component = new JTextField(); component.addKeyListener(new MyKeyListener()); JFrame f = new JFrame(); f.add(component); f.setSize(300, 300); f.setVisible(true); } } class MyKeyListener extends KeyAdapter { public void keyTyped(KeyEvent evt) { if (evt.getKeyChar() == 'a') { System.out.println("Check for key characters: " + evt.getKeyChar()); } if (evt.getKeyCode() == KeyEvent.VK_HOME) { System.out.println("Check for key codes: " + evt.getKeyCode()); } } }