Hello.
My question is: in example there is a KeyListener which waits for a particular button to be pressed. I need to make so that after the button is pressed once, the next several seconds it would be inactive. In other words, if I press it now, the keyPressed method would be executed, but after that the next 2 seconds I could spam the same button and nothing would be executed until the time is finished. After 2 seconds it becomes active again and once pressed would perform keyPressed method.
I hope you got the idea from my poor english.

Allowing users to click on a button that doesn't respond only creates the impression that something is wrong with your application, even if it is by design. Swing components typically support a setEnabled function that will allow you to disable the button altogether so users have visual feedback about what is supposed to function and what is not. If you couple that feature with the sleep() function of the Thread class or a javax.swing.Timer object, you can control just how long it will take for the button to be re-enabled.