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  1. import java.util.ArrayList;
  2. import java.util.List;
  3. import java.util.Objects;
  4. import java.util.Optional;
  5. import java.util.function.Predicate;
  6.  
  7. class Ideone {
  8.   public static void main(String[] args) {
  9.     List<String> list = new ArrayList<>();
  10.     list.add(null);
  11.     list.add("");
  12.     list.add("  ");
  13.     list.add("Hello");
  14.     list.add("world");
  15.     getFirstNotNull(list).ifPresent(System.out::println);
  16.   }
  17.  
  18.   private static Optional<String> getFirstNotNull(List<String> list) {
  19.     return list.stream()
  20.         .filter(Objects::nonNull)
  21.         .filter(Predicate.not(String::isBlank))
  22.         .findFirst();
  23.   }
  24. }
Success #stdin #stdout 0.11s 39112KB
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Standard input is empty
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Hello
https://ideone.com/Q4oEev
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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