6.18 桥接模式

1. 定义

适用于多个维度变化的类层次

2. uml

3. Java

3.1. client

public class Client
{
    public static void main(String[] args)
    {
        //创建联想兼笔记本
        Computer computer = new Laptop(new Lenovo());
        computer.sale();
    }
}

3.2. 维度1

public interface Brand
{
    void sale();
}

public class Dell implements Brand
{

    @Override
    public void sale()
    {
        System.out.println("戴尔品牌");
    }
}

public class Lenovo implements Brand
{

    @Override
    public void sale()
    {
        System.out.println("联想品牌");
    }
}

3.3. 维度2

public class Computer
{
    protected Brand brand;

    public Computer(Brand brand)
    {
        this.brand = brand;
    }

    public void sale()
    {
        this.brand.sale();
    }
}

class Desktop extends Computer
{
    public Desktop(Brand brand)
    {
        super(brand);
    }

    @Override
    public void sale()
    {
        super.sale();
        System.out.println("桌面机");
    }
}

public class Laptop extends Computer
{

    public Laptop(Brand brand)
    {
        super(brand);
    }

    @Override
    public void sale()
    {
        super.sale();
        System.out.println("笔记本");
    }
}

4. 参考

• 设计模式之结构型模式总结 - Structural Patterns - 简书