我是Swing的新手。我需要使用摇摆来实现拖放。在当前框架中包含不同的面板，即中心面板

我尝试用鼠标事件拖放。我把鼠标侦听器放在控制面板上。当我把标签/图像放在中间时panel.It读到-X

private void mak_lis(final SLabel l) {
   l.addMouseListener(new MouseAdapter() {
    public void mousePressed(MouseEvent m) {
       System.out.println("mak_lis Mouse mousePressed");

    setCursor(yd);
    // l.setBorder(new MatteBorder(1,1,1,1,Color.black));

    }
    public void mouseReleased(MouseEvent m) {
       l.setBorder(null);
       setCursor(dc);
       System.out.println("mak_lis Mouse mouseReleased");
       int x = -(m.getX() + l.getX() - leftPanel.getX());
       int y = m.getY() + l.getY() + leftPanel.getY();
       System.out.println("mak_lis Mouse mouseReleased" + "x" + x+ "y" + y);
       if (y > 0 && x > 0 && y < leftPanel.getHeight() && x < leftPanel.getWidth()) {
        leftPanel.add(new_lab(l, x, y));
                leftPanel.repaint();
        Component[] components1 = leftPanel.getComponents();
        Component component = null;
        for (int i = 0; i < components1.length; i++) {
          // System.out.println("components iii"+ components1[i]);
        component = components1[i];

            }

    }
}

});
}

请告诉我这里是否有任何遗漏。实现拖放功能的最佳方法是什么？