Basic Text Components - The Definitive Guide to Java Swing - page 551

public void run() {
JFrame frame = new JFrame("TextField Listener Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel namePanel = new JPanel(new BorderLayout());
JLabel nameLabel = new JLabel("Name: ");
nameLabel.setDisplayedMnemonic(KeyEvent.VK_N);
JTextField nameTextField = new JTextField();
nameLabel.setLabelFor(nameTextField);
namePanel.add(nameLabel, BorderLayout.WEST);
namePanel.add(nameTextField, BorderLayout.CENTER);
frame.add(namePanel, BorderLayout.NORTH);
JPanel cityPanel = new JPanel(new BorderLayout());
JLabel cityLabel = new JLabel("City: ");
cityLabel.setDisplayedMnemonic(KeyEvent.VK_C);
JTextField cityTextField = new JTextField();
cityLabel.setLabelFor(cityTextField);
cityPanel.add(cityLabel, BorderLayout.WEST);
cityPanel.add(cityTextField, BorderLayout.CENTER);
frame.add(cityPanel, BorderLayout.SOUTH);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
System.out.println("Command: " + actionEvent.getActionCommand());
}
};
nameTextField.setActionCommand("Yo");
nameTextField.addActionListener(actionListener);
cityTextField.addActionListener(actionListener);
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 + " / " +
keyEvent.getKeyChar());
}
};