Examples of java.util.OptionalInt

java.util.OptionalInt

A container object which may or may not contain a {@code int} value.If a value is present, {@code isPresent()} will return {@code true} and{@code getAsInt()} will return the value.

Additional methods that depend on the presence or absence of a contained value are provided, such as {@link #orElse(int) orElse()}(return a default value if value not present) and {@link #ifPresent(java.util.function.IntConsumer) ifPresent()} (execute a blockof code if the value is present).

This is a value-based class; use of identity-sensitive operations (including reference equality ( {@code ==}), identity hash code, or synchronization) on instances of {@code OptionalInt} may have unpredictable results and should be avoided. @since 1.8

    s4.addExamResult(new ExamResult("Chemistry", 65));
    s4.addExamResult(new ExamResult("Maths", 82));
    students.add(s4);


    //@formatter:off
    OptionalInt optionalInt = students.stream()
      .filter(s -> s.getGraduationDate().getYear() == 2014)
      .flatMap(s -> s.getExamResults().stream())
      .filter(er -> "Maths".equals(er.getExam()))
      .mapToInt(er -> er.getScore()) // Use specialised version of map function to get an IntStream
      .max(); // IntStream.max() is a short-cut for Stream.reduce(Integer::max)
    //@formatter:on    


    assertThat(optionalInt.isPresent(), is(true));
    assertThat(optionalInt.getAsInt(), is(76));
  }

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of java.util.OptionalInt

Related Classes of java.util.OptionalInt