java中如何判断鼠标滚轮是向上滚还是向下滚

2025-02-23 18:46:55
推荐回答(1个)
回答1:

AWT
MouseWheelListener listener = new MouseWheelListener() {
   public void mouseWheelMoved(MouseWheelEvent e) {
    int count = e.getWheelRotation();
    int direction = (Math.abs(count) > 0) ? UP : DOWN;
    changeBackground(frame, direction);
   }
  };
  button.addMouseWheelListener(listener);