Keyboard input for a game in Java

Question

I\'m writing a game in Java, right now it\'s Swing + JOGL - a JFrame with a GLCanvas.

I handle input using keyPressed etc. events (jframe.addKeyLi

Answer 1

Some of the tips in this article on global event listeners include catching key events with the KeyboardFocusManager, and might help with coming back from losing focus.

Regarding the 3+ keys, that's going to be tricky since the KeyEvent accounts for modifiers but not for multiple (regular) keys in its API. You might have to manage the press state yourself, in that if you get a KEY_PRESSED you store that key and build up the set of keys that are currently pressed. But if you simply don't get events at all when 3 or more keys are pressed, I'm not sure there's much you can do.

Edit: Also, the JGame library has a JOGL target. Looking at how it handles key events might help. I know it can handle at least 2 keys simultaneously.