FullScreen Swing Components Fail to Receive Keyboard Input on Java 7 on Mac OS X Mountain Lion

Question

Update 12/21:

7u10 was recently released. Confirmed that:

1. The issue still persists
2. Thankfully, the workaround still function

Answer 1

This is because the component to which you added the other has now lost focus, you can fix this by either:

• calling requestFocus() on the component instance to which you add KeyBindings

or

• alternatively use JComponent.WHEN_IN_FOCUSED_WINDOW with KeyBindings:

  component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_Q, 0),
                          "doSomething");
  component.getActionMap().put("doSomething",
                           anAction);
  

Reference:

• How to Use Key Bindings