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    <p>I created my own SSCCE and on testing, it seems that regardless of what technique is used, the applet still must request and gain focus for them to work. I've gotten this to successfully work on my windows system using either of two kludges, including a javax.swing.Timer that requests focus after xxx ms, or an override of the JApplet's <code>paint(...)</code> method that requests focus the first time paint is called (and when the applet is just being rendered). For example, showing both kludges (only one would be required) and an example of key bindings and of an SSCCE:</p> <pre><code>import java.awt.BorderLayout; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.lang.reflect.InvocationTargetException; import javax.swing.*; @SuppressWarnings("serial") public class KeyBindingEg extends JApplet { protected static final int TIMER_DELAY = 100; private boolean firstPane = true; @Override public void init() { createAndShowGui(); } private void createAndShowGui() { try { SwingUtilities.invokeAndWait(new Runnable() { public void run() { TestClass test = new TestClass(); getContentPane().add(test); // a kludge to get focus on the GUI some time after it has been created new Timer(TIMER_DELAY, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { requestFocusInWindow(); ((Timer)e.getSource()).stop(); } }).start(); } }); } catch (InterruptedException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } @Override public void paint(Graphics g) { super.paint(g); // another kludge to get focus on the GUI after it is // first rendered if (firstPane) { requestFocusInWindow(); firstPane = false; } } } @SuppressWarnings("serial") class TestClass extends JPanel { public TestClass() { setLayout(new BorderLayout()); add(new JLabel("TestClass", SwingUtilities.CENTER)); int condition = WHEN_IN_FOCUSED_WINDOW; InputMap inputMap = getInputMap(condition); ActionMap actionMap = getActionMap(); for (KeyInfo keyInfo : KeyInfo.values()) { KeyStroke keyStroke = KeyStroke.getKeyStroke(keyInfo.getKeyCode(), 0); inputMap.put(keyStroke , keyInfo.toString()); actionMap.put(keyInfo.toString(), new AbstractAction() { @Override public void actionPerformed(ActionEvent evt) { System.out.println("key press: " + evt.getActionCommand()); } }); } } } enum KeyInfo { UP(KeyEvent.VK_W), DOWN(KeyEvent.VK_S), LEFT(KeyEvent.VK_A), RIGHT(KeyEvent.VK_D); private int keyCode; private KeyInfo(int keyCode) { this.keyCode = keyCode; } public int getKeyCode() { return keyCode; } } </code></pre> <p>The above code using an AncestorListener:</p> <pre><code>import java.awt.BorderLayout; import java.awt.Component; import java.awt.event.*; import java.lang.reflect.InvocationTargetException; import javax.swing.*; import javax.swing.event.AncestorEvent; import javax.swing.event.AncestorListener; @SuppressWarnings("serial") public class KeyBindingEg extends JApplet { protected static final int TIMER_DELAY = 100; private boolean firstPane = true; @Override public void init() { createAndShowGui(); } private void createAndShowGui() { try { SwingUtilities.invokeAndWait(new Runnable() { public void run() { TestClass test = new TestClass(); JPanel contentPane = (JPanel) getContentPane(); contentPane.add(test); contentPane.addAncestorListener(new RequestFocusListener()); } }); } catch (InterruptedException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } } class RequestFocusListener implements AncestorListener { public void ancestorRemoved(AncestorEvent arg0) {} public void ancestorMoved(AncestorEvent arg0) {} @Override public void ancestorAdded(AncestorEvent aEvt) { Component comp = (Component) aEvt.getSource(); comp.requestFocusInWindow(); } } @SuppressWarnings("serial") class TestClass extends JPanel { public TestClass() { setLayout(new BorderLayout()); add(new JLabel("TestClass", SwingUtilities.CENTER)); int condition = WHEN_IN_FOCUSED_WINDOW; InputMap inputMap = getInputMap(condition); ActionMap actionMap = getActionMap(); for (KeyInfo keyInfo : KeyInfo.values()) { KeyStroke keyStroke = KeyStroke.getKeyStroke(keyInfo.getKeyCode(), 0); inputMap.put(keyStroke, keyInfo.toString()); actionMap.put(keyInfo.toString(), new AbstractAction() { @Override public void actionPerformed(ActionEvent evt) { System.out.println("key press: " + evt.getActionCommand()); } }); } } } enum KeyInfo { UP(KeyEvent.VK_W), DOWN(KeyEvent.VK_S), LEFT(KeyEvent.VK_A), RIGHT( KeyEvent.VK_D); private int keyCode; private KeyInfo(int keyCode) { this.keyCode = keyCode; } public int getKeyCode() { return keyCode; } } </code></pre>
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    1. POSub JComponent Won't gain focus despite visible, enabled being true
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    1. USHovercraft Full Of Eels
    1. USHovercraft Full Of Eels
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      1. VTUpMod
    1. COI suspect an `AncestorListener` as used in [dialog focus](http://tips4java.wordpress.com/2010/03/14/dialog-focus/) might be effective here.
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      1. USAndrew Thompson
    2. CO@AndrewThompson: less kludgy -- I think you're right. I'll try it later and if it works, edit the post. Thanks!
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      1. USHovercraft Full Of Eels
    3. COSo if I understand correctly the top level container must gain focus before it's possible to gain focus for the children container and it's ancestors? In my architecture I have more than ten Jpanels linked together... Therefore I hazard a guess that must force this with a protected void paintComponent() method for one of these sub panels that sets focus upon paint.
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      1. USpeter_gent
 

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