Optional Java Api

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Optional is primarily intended for use as a method return type where there is a clear need to represent no result and where using null is likely to cause errors A variable whose type is

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Optional is a container object which may or may not contain a non null value You must import java util package to use this class If a value is

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I think you are relying on default java serialization while using Optional in Java 8 Kindly note that Optional is not serializable and hence you will have to write your own JSON

https://docs.oracle.com › javase › docs › api
Provides classes for reading and writing the JAR Java ARchive file format which is based on the standard ZIP file format with an optional manifest file

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Understand the purpose of the Optional class and learn how to use it efficiently to design clear and robust APIs

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Optional object is used to represent null with absent value This class has various utility methods to facilitate code to handle values as available or not available instead of checking null

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The Optional is an attempt to reduce the number of null pointer exceptions in Java systems by adding the possibility to build more expressive APIs considering that sometimes return values are missing

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A quick and in depth tutorial to Optional API in java 8 Exploring various types of examples to understand the right usage 1 Overview In this tutorial You will learn in depth

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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