Java introduced the Optional class in Java 8 as part of the java.util package. It provides a more eloquent way to deal with cases that may or may not produce a value, thus helping to handle the absence of value situations without null references. Since its inception, Optional has been frequently used as a return type for methods, emphasizing that the method might not always return a meaningful value.
In this article, we’ll discuss some of the commonly asked interview questions related to Java Optionals, along with their short answers.
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1. What is Java Optional?
Optional is a container object that may or may not contain a non-null value. If a value is present, Optional.isPresent() returns true and Optional.get() returns the value. Otherwise, isPresent() returns false and get() throws a NoSuchElementException.
