设计模式-桥梁模式

旧城等待， 2023-02-16 01:48 151阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N1bnl1aHVhX2tleWJvYXJk_size_16_color_FFFFFF_t_70]

/** * 桥梁模式 * * 桥梁模式，其实就是理解代码抽象和解耦 * * */
    public class TestBridge { 
    
        public static void main(String[] args) { 
            Shape redCircle=new Circle(new RedPen(),10);
            Shape rectangle=new Rectangle(new GreenPen(),10,9);
            redCircle.draw();
            rectangle.draw();
        }
    }

/** *需要一个桥梁，它是一个接口，定义提供的接口方法 */
    public interface DrawAPI { 
        public void draw(int redius,int x,int y);
    }

/** * 定义抽象类，此类的实现类都需要使用 */
    public abstract class Shape { 
        protected DrawAPI drawAPI;
    
        public Shape(DrawAPI drawAPI) { 
            this.drawAPI = drawAPI;
        }
    
        public abstract void draw();
    }

/** * 长方形的画法 */
    public class Rectangle extends Shape { 
        private int x;
        private int y;
    
        public Rectangle(DrawAPI drawAPI,int x,int y) { 
            super(drawAPI);
            this.x=x;
            this.y=y;
        }
    
        @Override
        public void draw() { 
            drawAPI.draw(0,x,y);
        }
    }

/** * 画圆的类 */
    public class Circle extends Shape { 
        private int redius;
    
        public Circle(DrawAPI drawAPI, int redius) { 
            super(drawAPI);
            this.redius = redius;
        }
    
        @Override
        public void draw() { 
            drawAPI.draw(redius,0,0);
        }
    }

public class GreenPen implements DrawAPI { 
        @Override
        public void draw(int redius, int x, int y) { 
            System.out.println("用绿色笔画图,redius"+redius);
        }
    }

public class RedPen implements DrawAPI{ 
    
    
        @Override
        public void draw(int redius, int x, int y) { 
            System.out.println("用红色笔画图,redius"+redius);
        }
    }

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