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  1. import java.util.List;
  2. import java.util.stream.Collectors;
  3.  
  4. class Ideone {
  5.   public static void main(String[] args) {
  6.     final List<List<String>> listOfLists = List.of(List.of("A", "B"), List.of("C", "D"));
  7.     final List<String> list = listOfLists.stream()
  8.         .flatMap(List::stream)
  9.         .collect(Collectors.toList());
  10.     System.out.println(list);
  11.   }
  12. }
Success #stdin #stdout 0.14s 52284KB
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Standard input is empty
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[A, B, C, D]
https://ideone.com/MdFbNA
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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