Question

java中如何判断鼠标滚轮是向上滚还是向下滚

Answer 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);