[람다+함수인터페이스] 선생이 한거

package chap98_homework.nc230405;

import java.util.ArrayList;
import java.util.List;

import chap98_homework.nc230405.clazz.Card;

public class _02_hw_card {

   public static void main(String[] args) {
      // TODO Auto-generated method stub
      List<Card> cardList = 
            new ArrayList<Card>();
      
      cardList.add(new Card("a", 3));
      cardList.add(new Card("b", 1));
      cardList.add(new Card("c", 0));
      cardList.add(new Card("d", 1));
      cardList.add(new Card("e", 2));
      cardList.add(new Card("f", 5));
      
//    Stream<Card> cardStream =
//             cardList.stream();
//    
//    cardStream = 
//          cardStream.filter(c -> 
//                c.getVaildYear() <= 1);
//    
//    cardStream.forEach(c -> 
//       c.validEnlong(3, year -> {
//          System.out.println(year + "년 연장되었습니다.");
//          System.out.println(c.toString());
//       }));
      
      cardList.stream()
            .filter(c -> c.getVaildYear() <= 1)
            .forEach(c -> 
               c.validEnlong(3, year -> {
                  System.out.println(year + "년 연장되었습니다.");
                  c.setVaildYear(c.getVaildYear() + year);
                  System.out.println(c.toString());
               })); 
   }

}