这里:
public void paintComponet( Graphics g )
{
super.paintComponent(g);
                            g.drawString("dddd",50,0);
}
改成:
public void paint( Graphics g )
{
super.paint(g);
                            g.drawString("dddd",50,50);
}

解决方案 »

  1.   

    public void paintComponet( Graphics g )//paintComponet少了一个n
    {
    super.paintComponent(g);
                                g.drawString("dddd",50,0);
    }
    改为
    public void paintComponent( Graphics g )
    {
    super.paintComponent(g);
                                g.drawString("dddd",50,0);
    }