Class OptionalIsEmptyExamples

java.lang.Object

net.jrodolfo.java_evolution.java11.OptionalIsEmptyExamples

public class OptionalIsEmptyExamples
extends Object

Demonstrates Optional.isEmpty(), introduced in Java 11.

Before Java 11, checking for absence usually meant writing !optional.isPresent(). That works, but it expresses the idea through negation.

isEmpty() solves this readability problem by naming the empty case directly.

Constructor Summary

Constructors

Constructor	Description
OptionalIsEmptyExamples()

Method Summary

Modifier and Type	Method	Description
boolean	isMissing(Optional<String> value)	Uses Optional.isEmpty() as the direct opposite of Optional.isPresent().

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

OptionalIsEmptyExamples

public OptionalIsEmptyExamples()

Method Details

isMissing

public boolean isMissing(Optional<String> value)

Uses Optional.isEmpty() as the direct opposite of Optional.isPresent().

Parameters:

value - the Optional to inspect

Returns:

whether the Optional has no value