桥接模式类图

SF总是上传不了本地图片啊 ↑图在上面链接↑

interface Drawing{
    public void drawLine(double x1,double y1,double x2,double y2);
    public void drawCircle(double x,double y,double r);
}

class V1Drawing implements Drawing{
    public void drawLine(double x1,double y1,double x2,double y2){DP1.draw_a_line(x1,y1,x2,y2);}
    public void drawCircle(double x,double y,double r){DP1.draw_a_circle(x, y, r);}
}
class V2Drawing implements Drawing{
    public void drawLine(double x1,double x2,double y1,double y2){DP2.drawLine(x1,y1,x2,y2);}
    public void drawCircle(double x,double y,double r){DP2.drawcircle(x, y, r);}
}

class DP1{
    static public void draw_a_line(double x1,double y1,double x2,double y2){
        System.out.println("DP1 画的线");
    }
    static public void draw_a_circle(double x,double y,double r){
        System.out.println("DP1 画的圆");
    }
}
class DP2{
    static public void drawLine(double x1,double y1,double x2,double y2){
        System.out.println("DP2 画的线");
    }
    static public void drawcircle(double x,double y,double r){
        System.out.println("DP2 画的圆");
    }
}



abstract class Shape{
    
    private Drawing _dp;
    
    public Shape(Drawing dp){
        this._dp=dp;
    }
    
    abstract public void draw();
    
    public void drawLine(double x1,double y1,double x2,double y2){
        
        this._dp.drawLine(x1,x2,y1,y2);
    }
    public void drawCircle(double x,double y,double r){this._dp.drawCircle(x,y,r);}
    
}
class Rectangle extends Shape{
    
    private double _x1,_x2,_y1,_y2;
    
    
    public Rectangle(Drawing dp,double x1,double x2,double y1,double y2){
        super(dp);
        this._x1=x1;
        this._x2=x2;
        this._y1=y1;
        this._y2=y2;
        
    }
    public void draw(){
        System.out.println("画长方形"+this._x1+this._x2+this._y1+this._y2);
        drawLine(_x1,_x2,_y1,_y2);
        }
}
class Circle extends Shape{
    private double _x,_y,_r;
    public Circle (Drawing dp,double x,double y,double r){
        super(dp);
    }
    public void draw(){drawCircle(_x,_y,_r);}
}

public class qiaojie {
    
    public static void main(String[] args){
        V1Drawing v1=new V1Drawing();
        V2Drawing v2=new V2Drawing();
        Rectangle r1=new Rectangle(v1,1.0,2.0,3.0,4.0);
        r1.draw();
        v2.drawCircle(2.1, 4.5, 5.6);
        v2.drawLine(2.4, 3.3 ,4.2, 5.1);
    
    }    
}

都没有桥接模式标签啊。。。