适配器模式

//用户的目标接口
public interface Duck {
    void quack();
}

//被适配者
public class Chicken  {
    public void crow(){
        System.out.println("公鸡打鸣!");
    }
}

//适配器
public class ChickenAdapter implements Duck{
    Chicken chicken;
    public ChickenAdapter (Chicken chicken){
        this.chicken = chicken;
    }
    @Override
    public void quack() {
        chicken.crow();
    }
}

//客户端
public class Client {
    //通过鸭子接口让鸡打鸣
    public static void main(String[] args){
        Duck chickenAdapter = new ChickenAdapter(new Chicken());
        chickenAdapter.quack();
    }
}