Java Optional Example

https://howtodoinjava.com/java8/java-8-optionals...
Java Optional is a way of replacing a nullable T reference with a non null value An Optional may either contain a non null T reference in which case we say the value is present or it may contain nothing in which case we say the value is absent

https://www.geeksforgeeks.org/java-8-optional-class
The stream method of java util Optional class in Java is used to get the sequential stream of the only value present in this Optional instance If there is no value present in this Optional instance then this method returns returns an empty Stream Syntax public Stream lt T gt stream Parameters This method do not accept any

https://www.javatpoint.com/java-8-optional
Java introduced a new class Optional in jdk8 It is a public final class and used to deal with NullPointerException in Java application You must import java util package to use this class It provides methods which are used to check the

https://www.callicoder.com/java-8-optional-tutorial
Java 8 introduced a new type called Optional to help developers deal with null values properly The concept of Optional is not new and other programming languages have similar constructs For example Scala has Optional T Haskell has Maybe type

https://www.baeldung.com/java-optional-uses
Understand the purpose of the Optional class and learn how to use it efficiently to design clear and robust APIs

https://www.javaguides.net/2018/07/java-8-optional-class.html
Java introduced a new class Optional in JDK 8 It is a public final class and used to deal with NullPointerException in Java application You must import java util package to use this class It provides methods which are used to check the presence of a value for the particular variable

https://techblogstation.com/java/java-8-optional...
We have learnt What is Java 8 Optional Its advantage and what problems are solved by using Optional in Java We also understood different methods of Java 8 Optional with some illustrative examples

https://stackabuse.com/guide-to-optional-in-java-8
An Optional is essentially a container It is designed either to store a value or to be empty if the value is non existent a replacement for the null value As we will see in some later examples this replacement is crucial as it allows implicit null checking for every object represented as an Optional

https://www.cloudhadoop.com/java8-optional-class-example
Optional is a class defined in java util package since Java8 version It uses to check the values or object are present or not It avoids null checks and NullPointerExceptions The optional class is a container for holding values For example The below function has a parameter with EmpId