适配者模式7（10）

电源给手机充电，需要将220V转换成5V

电源：AC220A 适配者

转换：ObjectPowder 适配器

手机：DC5A 目标

package structural.pratice;

public class AdapterP4Main {

    public static void main(String[] args) {
        AC220A dc = new AC220A();
        ObjectPowder op = new ObjectPowder(dc);
        op.in();
    }
}

interface AC220Target{
    public int output220();
}

class AC220A implements AC220Target{
    @Override
    public int output220(){
        System.out.println("电源");
        return 220;
    }
}

interface DC5AdapteeA{
    public int in();
}
class DC5A implements DC5AdapteeA{

    @Override
    public int in(){
        System.out.println("手机");
        return 5;
    }
}

class ObjectPowder implements DC5AdapteeA{
    private AC220A ac;
    ObjectPowder(AC220A ac){
        this.ac = ac;
    }
    @Override
    public int in(){
        int out = ac.output220();
        int in = out-215;
        System.out.println(in);
        return in;
    }
    
}