java8实现两个list取交集

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package test;   import java.util.ArrayList; import java.util.List; import java.util.stream.Collectors;   public class ListAndList {     /**      * java8实现两个list取交集      * @param args      */       public static void main(String[] args) {          List<Integer> accountIdListOne = new ArrayList<>();             accountIdListOne.add(1);             accountIdListOne.add(2);             accountIdListOne.add(3);             accountIdListOne.add(4);                    List<Integer> accountIdListTwo = new ArrayList<>();             accountIdListTwo.add(3);             accountIdListTwo.add(4);             accountIdListTwo.add(5);             accountIdListTwo.add(6);                                         List<Integer> accountIdList = accountIdListOne.stream().filter(accountIdListTwo::contains).collect(Collectors.toList());                           System.out.println(accountIdList.toString());       }   }