在监听器Mouse类中修改代码

//创建图形类数组，每个单元存放一个图形
Shape[] s = new Shape[10];
//下标
int index=0;

public void mouseReleased(MouseEvent e){ x2 = e.getX(); y2 = e.getY(); if("直线".equals(text)) { g.drawLine(x1,y1,x2,y2); //创造shape类对象，将原图形的数据记录在缓存中 Shape h = new Shape(); h.x1 = x1; h.x2 = x2; h.y1 = y1; h.y2 = y2; h.type = "直线"; s[index++] = h; } if("矩形".equals(text)) { g.drawRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2)); //创造shape类对象，将原图形的数据记录在缓存中 Shape h = new Shape(http://www.amjmh.com/v/BIBRGZ_558768/); h.x1 = x1; h.x2 = x2; h.y1 = y1; h.y2 = y2; h.type = "矩形"; s[index++] = h; } }---------------------