package com.test.bridge;

interface Brand {
 public void sale();
}

class Dell implements Brand {
 public void sale() {
 System.out.println("销售戴尔品牌电脑");
 }
}

class Lenovo implements Brand{
 public void sale() {
 System.out.println("销售联想品台电脑");
 }
}

class Computer {
 protected Brand brand;
 public Computer(Brand b) {
 this.brand = b;
 }
 public void sale() {
 brand.sale();
 }
}

class Desktop extends Computer{

 public Desktop(Brand b) {
 super(b);
 }
 @Override
 public void sale() {
 super.sale();
 System.out.println("电脑类型为台式电脑");
 }
}

class Laptop extends Computer{

 public Laptop(Brand b) {
 super(b);
 }
 public void sale() {
 super.sale();
 System.out.println("电脑类型为笔记本");
 }
}

class Pad extends Computer{

 public Pad(Brand b) {
 super(b);
 }
 @Override
 public void sale() {
 super.sale();
 System.out.println("电脑类型为平板电脑");
 }
}

public class Demo {
 public static void main(String[] args) {
 //销售联想笔记本
 Brand b = new Lenovo();
 Computer c = new Laptop(b);
 c.sale();
 
 //销售dell台式机
 Brand b1 = new Dell();
 Computer c1 = new Desktop(b1);
 c1.sale();
 }
}