Examples of OptionalLong

• java.util.OptionalLong
  A container object which may or may not contain a {@code long} value.If a value is present, {@code isPresent()} will return {@code true} and{@code getAsLong()} will return the value.

  Additional methods that depend on the presence or absence of a contained value are provided, such as {@link #orElse(long) orElse()}(return a default value if value not present) and {@link #ifPresent(java.util.function.LongConsumer) 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 OptionalLong} may have unpredictable results and should be avoided. @since 1.8

Examples of java.util.OptionalLong