Java optional parameters

1. Overview. In this tutorial, we’re going to show the Optional class that was introduced in Java 8 . The purpose of the class is to provide a type-level solution for representing optional values instead of null references.1 Eki 2021

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 present, isPresent() will return true and get() will return the value.19 Şub 2022

By the way, here is how Optional is described in the Java SE 11 documentation: “ 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 .

When to Not Return Optional. Because Optional is a wrapper and value-based class, there are some operations that can’t be done against Optional object. Many times, it’s just simply better to return the actual type rather than an Optional type .

1. Overview. In this tutorial, we’re going to show the Optional class that was introduced in Java 8 . The purpose of the class is to provide a type-level solution for representing optional values instead of null references.1 Eki 2021