对于微调器，如何检测是通过单击按钮还是通过按键进行更改？

Question

There are 2 ways to change a spinner's value, either by clicking the up or down button, or by pressing the up or down key. If I know spinner's value is changed, how do I know whether it is caused by button clicking or key pressing?

Answer 1

Try to get the current event from the event queue.

if (EventQueue.getCurrentEvent() instanceof KeyEvent) {
  // process key event
} else if (EventQueue.getCurrentEvent() instanceof MouseEvent) {
  // process mouse event
}

The method returns an AWTEvent but in most cases it's either mouse or key event.