JPasswordField affects key bindings

Question

I set up some key bindings so my program can react to the arrow keys. I came across a rather confusing problem. I've set up a test case to show it:
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;
public class TestCase extends JFrame {
     private static final long serialVersionUID = 1L;
     JPanel contentPane;
     CardLayout cl = new CardLayout();
     public TestCase() {
          super("Terraworld GUI Testing Zone");
          setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
          setResizable(false);
          contentPane = new JPanel(cl);
          contentPane.add(new TestTitlePanel(), "Title Screen");
          setContentPane(contentPane);
          pack();
          setVisible(true);
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    new TestCase();
     public void addCard(JPanel card, String name, boolean show) {
          contentPane.add(card, name);
          if(show == true) {
               cl.show(contentPane, name);
     public void removeCard(JPanel card, String name) {
          contentPane.remove(card);
          cl.show(contentPane, name);
class TestTitlePanel extends JPanel implements MouseListener {
     private static final long serialVersionUID = 1L;
     JLabel loadCharacter;
     public TestTitlePanel() {
          super();
          setPreferredSize(new Dimension(800, 600));
          loadCharacter = new JLabel("Load Character");
          loadCharacter.addMouseListener(this);
          add(loadCharacter);
     public void mouseClicked(MouseEvent e) {
          if(e.getSource().equals(loadCharacter)) {
               ((TestCase)(getRootPane().getParent())).addCard(new TestLoadCharacterPanel(), "Load Character Screen", true);
     public void mouseEntered(MouseEvent e) {}
     public void mouseExited(MouseEvent e) {}
     public void mousePressed(MouseEvent e) {}
     public void mouseReleased(MouseEvent e) {}
class TestLoadCharacterPanel extends JPanel {
     private static final long serialVersionUID = 1L;
     public TestLoadCharacterPanel() {
          super(null);
          setPreferredSize(new Dimension(800, 600));
          add(new LoadCharacterForm());
     public class LoadCharacterForm extends JPanel implements ActionListener, MouseListener {
          private static final long serialVersionUID = 1L;
          JTextField usernameField;
          JPasswordField passwordField;
          JLabel cancelButton;
          JLabel okButton;
          public LoadCharacterForm() {
               super(null);
               setBounds(204, 167, 396, 225);
               usernameField = new JTextField();
               usernameField.addActionListener(this);
               usernameField.setBounds(263, 46, 109, 20);
               usernameField.setFont(new Font(Font.SANS_SERIF,
                         usernameField.getFont().getStyle(),12));
               usernameField.setText("Default");
               passwordField = new JPasswordField();
               passwordField.addActionListener(this);
               passwordField.setBounds(262, 71, 109, 20);
               passwordField.setText("Default");
               cancelButton = new JLabel("Cancel");
               cancelButton.addMouseListener(this);
               cancelButton.setBounds(163, 113, 45, 15);
               okButton = new JLabel("Ok");
               okButton.addMouseListener(this);
               okButton.setBounds(347, 113, 28, 15);
               add(usernameField);
               add(passwordField);
               add(cancelButton);
               add(okButton);
          public void actionPerformed(ActionEvent e) {
               String username = usernameField.getText();
               String password = new String(passwordField.getPassword());
               String error = "";
               if(!username.equals("") && !password.equals("")) {
                    ((TestCase)(getRootPane().getParent())).addCard(new TestGamePanel(), "Game Screen", false);
                    ((TestCase)(getRootPane().getParent())).removeCard(TestLoadCharacterPanel.this, "Game Screen");
               else {
                    if(username.equals("")) {
                         error = "Username field is empty!";
                    if(password.equals("")) {
                         if(!error.equals("")) {
                              error += System.getProperty("line.separator");
                         error += "Password field is empty!";
                    JOptionPane.showMessageDialog(null, error);
          public void mouseClicked(MouseEvent e) {
               if(e.getSource().equals(okButton)) {
                    actionPerformed(new ActionEvent(usernameField, 1, ""));
               else if(e.getSource().equals(cancelButton)) {
                    ((TestCase)(getRootPane().getParent())).removeCard(TestLoadCharacterPanel.this, "Title Screen");
          public void mouseEntered(MouseEvent e) {}
          public void mouseExited(MouseEvent e) {}
          public void mousePressed(MouseEvent e) {}
          public void mouseReleased(MouseEvent e) {}
class TestGamePanel extends JPanel {
     private static final long serialVersionUID = 1L;
     public TestGamePanel() {
          super(null);
          setPreferredSize(new Dimension(800, 600));
          setFocusable(true);
          requestFocusInWindow();
          Action downAction = new DownAction("Down", "Down");
          Action upAction = new UpAction("Up", "Up");
          Action rightAction = new RightAction("Right", "Right");
          Action leftAction = new LeftAction("Left", "Left");
          getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("DOWN"), downAction.getValue(Action.NAME));
          getActionMap().put(downAction.getValue(Action.NAME), downAction);
          getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("UP"), upAction.getValue(Action.NAME));
          getActionMap().put(upAction.getValue(Action.NAME), upAction);
          getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("RIGHT"), rightAction.getValue(Action.NAME));
          getActionMap().put(rightAction.getValue(Action.NAME), rightAction);
          getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("LEFT"), leftAction.getValue(Action.NAME));
          getActionMap().put(leftAction.getValue(Action.NAME), leftAction);
     class DownAction extends AbstractAction {
          private static final long serialVersionUID = 1L;
          public DownAction(String text, String desc) {
               super(text);
               putValue(SHORT_DESCRIPTION, desc);
          public void actionPerformed(ActionEvent e) {
               JOptionPane.showMessageDialog(null, "Down");
     class UpAction extends AbstractAction {
          private static final long serialVersionUID = 1L;
          public UpAction(String text, String desc) {
               super(text);
               putValue(SHORT_DESCRIPTION, desc);
          public void actionPerformed(ActionEvent e) {
               JOptionPane.showMessageDialog(null, "Up");
     class RightAction extends AbstractAction {
          private static final long serialVersionUID = 1L;
          public RightAction(String text, String desc) {
               super(text);
               putValue(SHORT_DESCRIPTION, desc);
          public void actionPerformed(ActionEvent e) {
               JOptionPane.showMessageDialog(null, "Right");
     class LeftAction extends AbstractAction {
          private static final long serialVersionUID = 1L;
          public LeftAction(String text, String desc) {
               super(text);
               putValue(SHORT_DESCRIPTION, desc);
          public void actionPerformed(ActionEvent e) {
               JOptionPane.showMessageDialog(null, "Left");
}When you run that, click Load Character, then just click OK. If you press the arrow keys, corresponding alerts should come up. Now, if you rerun the program, and edit the JPasswordField in any way, then click OK, if you press the arrow keys, nothing happens. Somehow, by editing the password field, key bindings get messed up.
Does anyone know why this happens and how to fix it?

Answer 1

Eh, I hate it when this happens, but I figured it out not long after I posted this. Sorry.
The problem was the Load Character screen was not being removed properly due to bad technique that I got from a source on Google. So the password field, which (if I understand properly) disables key bindings for security when it has the focus, or something along those lines, was not allowing the key bindings to happen.
To see further evidence, try editing the password field, then place the cursor in the top field (that says "Default") and click OK. It works.
Anyway, to fix the above code, I just changed the cases of TestLoadCharacterPanel.this (which didn't make any sense anyway) to this, which I didn't think would work, since it's an embedded class. But it did.
Sorry for the pointless post.