请高手指教，ShapePanel 如何调用，在哪个包中？？

Question

ShapePanel类在哪个包中

Answer 1

据我所知，API中没有这个类，自定义的吧。

Answer 2

class ShapePanel extends JPanel
  {    
    public ShapePanel()
    {
      setPreferredSize(new Dimension(300, 300));
      addMouseListener(new MouseAdapter()
      {
        public void mouseClicked(MouseEvent evt)
        {
           begin.x = evt.getX();
                     begin.y = evt.getY();
        
                     end.x = (int)((Math.random() * (width + 1)));
                     end.y = (int)((Math.random() * (height + 1)));
                     Insets border = getInsets();
                     width = getWidth() - (border.left + border.right);
           height = getHeight() - (border.top + border.bottom);
 
           if (begin.x > end.x)
                     {
                        minx = end.x;
                        rwidth = begin.x - minx;
                     }
                     else
                     {
                        minx = begin.x;
                        rwidth = end.x - minx;
                     }
           
                     if (begin.y > end.y)
                     {
                  miny = end.y;
                        rheight = begin.y - miny;
                     }
                     else
                     {
                  miny = begin.y;
                        rheight = end.y - miny;
                     }       
                        repaint();  
         }
      });
      
      addMouseMotionListener(new MouseMotionAdapter()
      {
          public void mousePressed(MouseEvent evt)
                   {
                       begin.x = evt.getX();
                       begin.y = evt.getY();  
                    }
      });
      
      addMouseMotionListener(new MouseMotionAdapter()
      {
             public void mouseDraqqed(MouseEvent evt)
                   {
                       end.x = evt.getX();
                       end.y = evt.getY();   
                       repaint();   
                   }
        
      });
        }  
    public void paintComponent(Graphics g)
    {
      g.drawRect(minx, miny, rwidth, rheight);
     
    }
  }
//baidu一搜一大堆,这是其中一个,楼主试试,不行的话自己搜搜吧.