Java 适配器模式 练习

1.老的接口

package adapter;

public interface OldInterface {
      /**
       * 老的计划
       */
       public void oldPlan();
}

2.老的接口实现类

package adapter;

public class OldImp implements OldInterface{

     @Override
     public void oldPlan() {
          System.err.println("这是老的计划！");
     }

}

3.新的接口

package adapter;

public interface NewInterface {
       /**
       * 新的计划
       */
       public void newPlan();
}

4.新的接口实现类

package adapter;

public class NewImp implements NewInterface {

   @Override
   public void newPlan() {
         System.err.println("这是新的计划！");
   }

}

5.适配器

package adapter;

public class Adapter implements OldInterface {

    private NewInterface newImp;
    
    public Adapter (NewInterface newImp){
          this.newImp = newImp;
    }
    
   @Override
   public void oldPlan() {
         newImp.newPlan();
   }

}

6.测试

package adapter;

public class demo {

     public static void main(String[] args) {
            NewInterface newi = new NewImp();
            Adapter ada = new Adapter(newi);
            ada.oldPlan();
     }
     
}

7.结果，调用老的方法实现新的计划