23种设计模式中篇

//抽象的实现类
public interface Memory {

    void addMemory();
}

//具体的实现类
public class Memory6G  implements Memory{

    @Override
    public void addMemory() {
        System.out.println("安装了6G内存");
        
    }

}

//具体的实现类
public class Memory8G  implements Memory{

    @Override
    public void addMemory() {
        System.out.println("安装了8G内存");
    }

}

//具体部分的抽象
public abstract class Phone {
    
    protected  Memory memory;

    public void setMemory(Memory memory) {
        this.memory = memory;
    }
    
    protected abstract void buyPhone();
}

public class Huiwei extends Phone{

    
    @Override
    protected void buyPhone() {
        System.out.println("购买华为手机");
        memory.addMemory();
        
    }

}

public class Xiaomi extends  Phone {

    @Override
    protected void buyPhone() {
        System.out.println("购买小米手机");
        memory.addMemory();
    }

}

public class MainClass {

    public static void main(String[] args) {
        
        Phone  phone =   new Huiwei();
        phone.setMemory(new Memory6G());
        phone.buyPhone();
        System.out.println("===============");
        phone.setMemory(new Memory8G());
        phone.buyPhone();
        
    }
}