使用Graphics2D画虚线和设置线的宽度

public   void   paint(Graphics   g)   {   
                  Graphics2D   g2d   =   (Graphics2D)g;   
                  Stroke   st   =   g2d.getStroke();   
                  Stroke   bs;   
                  //LINE_TYPE_DASHED   
                  bs   =   new   BasicStroke(1,   BasicStroke.CAP_BUTT,   
                                                            BasicStroke.JOIN_BEVEL,   0,   
                                                            new   float[]{16,   4},   0);   
                  g2d.setStroke(bs);   
                  g2d.drawLine(10,   10,   10,   500);   
    
                  g2d.setStroke(st);   
          }

 

设置线的宽度只要new BasicStroke(2.5f) 2.5f为宽度，可任意改变，虚线部分是如下stroke：

                                   new   BasicStroke(1,   BasicStroke.CAP_BUTT,  
                                                            BasicStroke.JOIN_BEVEL,   0,  
                                                            new   float[]{16,   4},   0);