上級 › stream has already been operated upon の原因と直し方 › パターン3

stream has already been operated upon の原因と直し方

Streamは1回しか終端操作できません。

 1  import java.util.List;
 2  
 3  public class Main {
 4      public static void main(String[] args) {
 5          List.of(1, 2, 3).stream().filter(n -> n > 1)_____________________________;
                                                                      ^
 6          System.out.println("done");
 7      }
 8  }