Java - 如何在形状上绘制轮廓矩形

Question

如何在形状上绘制轮廓矩形？ 我有很多形状，我想用轮廓矩形包围它们？ 我先画了fill()然后draw()

public void paint(Graphics g){
      Graphics2D g2d = (Graphics2D) g; 
            Rectangle2D R = getRect();
            g2d.setColor(Color.blue);
            g2d.fill(path);
            g2d.setColor(Color.red);                    
            g2d.draw(R);                    
      }

getRect()方法：

public Rectangle2D getRect(){
      return new Rectangle2D.Double(MinX(),MinY(),MaxX(),MaxY());
  }

MaxX()和MaxY()方法是相同的，除了更改Y而不是X：

public double MaxX(){ 
     double max = Double.MIN_VALUE;//check the smallest double value
     double maxPathEntry=0.0;
     Paths01 p=new Paths01();
     for ( int i = 0 ; i < PathsList.size() ; i++ ) {
        maxPathEntry = PathsList.get(i).MaxX();
         if (maxPathEntry > max ){
             max = maxPathEntry;
         }
     else if (p.MoveToX > maxPathEntry){ 
         max = p.MoveToX;
     }
     }
     return max;
  }

MinX()和MinY()方法是：

public double MinX(){ 
     double min = Double.MAX_VALUE;//check the biggest double value
     double minPathEntry=0.0;
     Paths01 p=new Paths01();
     for ( int i = 0 ; i < PathsList.size() ; i++ ) {
        minPathEntry = PathsList.get(i).MinX();
         if (minPathEntry < min ){
             min = minPathEntry;
         }
     else if (p.MoveToX < minPathEntry){ 
         min= p.MoveToX;
     }
     }
     return min;
  }

但是当它工作时，它没有在形状上显示精确的轮廓矩形，它在形状上显示不合适的轮廓矩形