设计模式-9-桥接模式

桥接模式：用于把抽象化与实现化解耦，使得二者可以独立变化。

帮助理解：现有颜色（白，灰，黑）和形状（正方形，长方形，圆形），现需要将三种两两配对。

形状抽象类:

package com.structuralPattern.bridge.edition1;public abstract class Shape {    Color color;//颜色抽象类，是颜色和形状配对    public void setColor(Color color) {        this.color = color;    }        public abstract void draw();}

形状实际类：

package com.structuralPattern.bridge.edition1;public class Circle extends Shape{    public void draw() {        color.bepaint("圆形");    }}

package com.structuralPattern.bridge.edition1;public class Rectangle extends Shape{    public void draw() {        color.bepaint("长方形");    }}

package com.structuralPattern.bridge.edition1;public class Square extends Shape{    public void draw() {        color.bepaint("正方形");    }}

颜色抽象类：

package com.structuralPattern.bridge.edition1;public interface Color {    public void bepaint(String shape);}

实际颜色类

package com.structuralPattern.bridge.edition1;public class White implements Color{    public void bepaint(String shape) {        System.out.println("白色的" + shape);    }}

package com.structuralPattern.bridge.edition1;public class Gray implements Color{    public void bepaint(String shape) {        System.out.println("灰色的" + shape);    }}

package com.structuralPattern.bridge.edition1;public class Black implements Color{    public void bepaint(String shape) {        System.out.println("黑色的" + shape);    }}

将颜色和形状进行组合

package com.structuralPattern.bridge.edition1;/* * 将形状和颜色，进行组合 */public class Client {    public static void main(String[] args) {        //白色        Color white = new White();        //正方形        Shape square = new Square();        //白色的正方形        square.setColor(white);        square.draw();                //长方形        Shape rectange = new Rectangle();        rectange.setColor(white);        rectange.draw();    }}