How to negate a method reference predicate

by

Predicate.not( … )

java-11 offers a new method Predicate#not

So you can negate the method reference:

Stream<String> s = ...;
long nonEmptyStrings = s.filter(Predicate.not(String::isEmpty)).count();

More Related Contents:

  1. How to apply multiple predicates to a java.util.Stream?
  2. Built-in Java 8 predicate that always returns true?
  3. convert String list in List of object [duplicate]
  4. Is it possible to use Java 8 for Android development?
  5. Custom thread pool in Java 8 parallel stream
  6. What’s the difference between map() and flatMap() methods in Java 8?
  7. Java 8 lambdas, Function.identity() or t->t
  8. Reflection type inference on Java 8 Lambdas
  9. Why java.util.Optional is not Serializable, how to serialize the object with such fields
  10. Filter values only if not null using lambda in Java8
  11. Retrieving a List from a java.util.stream.Stream in Java 8
  12. Java 8: How do I work with exception throwing methods in streams?
  13. Java 8 LocalDateTime deserialized using Gson
  14. Why does Iterable not provide stream() and parallelStream() methods?
  15. Java Streams: How to do an efficient “distinct and sort”?
  16. How does combiner in Stream.collect method work in java 8?
  17. How to make a lambda expression define toString in Java 8?
  18. Why isn’t @FunctionalInterface used on all the interfaces in the JDK that qualify?
  19. How to make Selenium wait until an element is present?
  20. How can I throw CHECKED exceptions from inside Java 8 lambdas/streams?
  21. Parallel stream from a HashSet doesn’t run in parallel
  22. How to get a Stream from a float[]
  23. Difference between findAny() and findFirst() in Java 8
  24. Add Buttons to Tabs and Tab area JavaFX
  25. ‘Optional.get()’ without ‘isPresent()’ check
  26. Most elegant way to join a Map to a String in Java 8
  27. FunctionalInterface Comparator has 2 abstract methods
  28. Perform operation on n random distinct elements from Collection using Streams API
  29. How to combine 3 or more CompletionStages?
  30. Stream.peek() method in Java 8 vs Java 9

Leave a Comment