Java tutorial
import java.awt.BorderLayout; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JFrame; import javax.swing.JTextField; public class AddingActionCommandActionListenerSample { public static void main(String args[]) { JFrame frame = new JFrame("Default Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTextField textField = new JTextField(); frame.add(textField, BorderLayout.NORTH); KeyListener keyListener = new KeyListener() { public void keyPressed(KeyEvent keyEvent) { printIt("Pressed", keyEvent); } public void keyReleased(KeyEvent keyEvent) { printIt("Released", keyEvent); } public void keyTyped(KeyEvent keyEvent) { printIt("Typed", keyEvent); } private void printIt(String title, KeyEvent keyEvent) { int keyCode = keyEvent.getKeyCode(); String keyText = KeyEvent.getKeyText(keyCode); System.out.println(title + " : " + keyText); } }; textField.addKeyListener(keyListener); textField.addKeyListener(keyListener); frame.setSize(250, 150); frame.setVisible(true); } }