桥接模式

Posted 2021-02-12 forthedream1991

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了桥接模式相关的知识，希望对你有一定的参考价值。

1.基本概念

将抽象化与实现化解耦
UML

　　技术图片

2.代码实现

package com.chengjie;

interface DrawAPI {
    void drawCircle(int radius, int x, int y);
}

class RedCircle implements DrawAPI {
    @Override
    public void drawCircle(int radius, int x, int y) {
        System.out.println("Drawing Circle[ color: red, radius: " + radius +", x: " +x+", "+ y +"]");
    }
}
class GreenCircle implements DrawAPI {
    @Override
    public void drawCircle(int radius, int x, int y) {
        System.out.println("Drawing Circle[ color: green, radius: "
                + radius +", x: " +x+", "+ y +"]");
    }
}

abstract class Shape1 {
    public Shape1(DrawAPI drawAPI) {
        this.drawAPI = drawAPI;
    }

    protected DrawAPI drawAPI;
    public abstract void draw();
}

class Circle1 extends Shape1 {
    private int radius, x, y;

    public Circle1(DrawAPI drawAPI, int radius, int x, int y) {
        super(drawAPI);
        this.radius = radius;
        this.x = x;
        this.y = y;
    }

    @Override
    public void draw() {
        this.drawAPI.drawCircle(radius, x, y);
    }
}
public class TestBridge {
    public static void main(String[] args) {
        Circle1 redCircle = new Circle1(new RedCircle(),100, 10, 10);
        Circle1 greenCircle = new Circle1(new GreenCircle(),100, 10, 10);
        redCircle.draw();
        greenCircle.draw();
    }
}