JList中，当鼠标移动到某一项上时就高亮显示，该如何做这个事件

Point lastPoint;jlist.addMouseListener(new MouseAdapter(){    @Override public void mouseEntered(MouseEvent e){        lastPoint = e.getPoint();    }};jlist.addMouseMotionListener(new MouseMotionAdapter(){    @Override public void mouseMoved(MouseEvent e){        int lastIndex = jlist.locationToIndex(lastPoint);        Point current = e.getPoint();        int currentIndex = jlist.locationToIndex(current);        if (currentIndex == lastIndex) return;        ... // highlight        lastPoint = current;    }};