晕死,照书抄的程序没用???

Question

muosePressed 你写成了 mousepressed，注意大小写        addMouseListener(new MouseAdapter() {            public void mousePressed(MouseEvent e) {
                points.add(new Point(e.getX(), e.getY()));
                repaint();
            }
        });另，你的windowClosing 写成了 windowsClosing  public void windowClosing(WindowEvent e) {