设计模式之桥接模式 Bridge

代码实现

public interface Brand {
    void sale();
}

class Lenovo implements Brand{

    @Override
    public void sale() {
        System.out.println("销售联想电脑");
    }

}

class Dell implements Brand{

    @Override
    public void sale() {
        System.out.println("销售戴尔电脑");
    }

}

接口类与实现

/**
 * 电脑类型的维度
 * @author bzhx
 * 2017年3月13日
 */
public class Computer {

    protected Brand brand;

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

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

class Desktop extends Computer{

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

    @Override
    public void sale() {
        super.sale();
        System.out.println("销售台式机！");
    }

}

class Laptop extends Computer{

    public Laptop(Brand brand) {
        super(brand);
        // TODO Auto-generated constructor stub
    }

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

}

public class Client {
    public static void main(String[] args) {
        //销售联想笔记本
        Computer c = new Laptop(new Lenovo());
        c.sale();
    }
}

调用