#java8 What is Optional class in java 8 ? Why Optional class is introduced in java 8 ? | #java

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In todays interview we have seen
what is Optional class ?

The Optional is a wrapper class that makes a field optional which means it may or may not have values. It improves the readability .
By using Optional, you can specify alternative values to return when something is null.
EX. if you have an Employee Object and it has yet to assign a department, instead of returning null, you can return a default department. Earlier, there was no option to specify such default value in Java code but from Java 8 onwards, Optional can be used for that.

How to create Optional ?

Important methods of Optional Class

get()
isPresent()
orElse()
orElseThrows()

Java Interview questions on java8 new features
java8 new features
Lambda expressions and Functional Interface
Default Methods in java8

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