How can I detect if caps lock is toggled in Swing?

Question

I\'m trying to build a better username/password field for my workplace and would like to be able to complain when they have their caps lock on.

Is this possible? An

Answer 1

here is some info on the class http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Toolkit.html#getLockingKeyState(int)

Answer 2

In addition to Nick's answer, to react to this condition before the user presses a key, you can listen to the focus event of your text entry component and test the caps-lock as the component receives focus.

Answer 3

Try this, from java.awt.Toolkit, returns a boolean:

Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK)