Optional Class - Learn Data Science with Travis

Optional class members

Software Architecture with C plus plus

Achieving coherence in a class state is not always an easy task. For instance, sometimes, you want to have a member or two that can simply not be set. Instead of creating another class for such a case...

Optional Class in Java 8: Making Your Code More Clear and Concise .

Javarevisited

The Optional class in Java 8 is a container object which is used to contain a value that might or might not be present. It was introduced as a way to help reduce the number of NullPointerExceptions th...

Optionals

Codecademy

Optionals are types that deal with scenarios involving the potential presence or absence of a value ( nil ). Syntax In Swift, a non-optional variable should not be set to nil . Rather, the optional ty...

Why Bother With Optional?

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Use Optional for No More Surprise everyone know findUser might not find anything. No more surprise! The Golden Rules of Optional 🏆 1. Return Types Only, Please! 🚫 Use Optional only for method return...

Using Optionals

Learn Java

Supporting Methods That Cannot Produce a Result We already covered several uses of the Optional class, especially in the case where you are calling a terminal operation on a stream that does not have...

Null Check vs Optional? Are they same

Javarevisited

When this question was asked in an interview, like everyone I answered “Java 8 has introduced this new class Optional in java.util package. By using Optional, we are avoiding null checks and can speci...

Difference between Java 8 Optional class orElse and orElseGet methods.

Javarevisited

Hello Readers,Java 8 introduces a number of new features like Lambda expressions, Method references, Functional interfaces, Stream API, Default methods, etc to make a developer's life easy. One of the...

Java 8 — Optional — Why and When to Use them?

Javarevisited

In Java programming, null values can be a source of frustration and errors. So to address this issue, Java 8 introduced the Optional class, a container object that can either contain a non-null value ...

An argument for using Optional as input parameters

Level Up Coding

This article may be the hardest I wrote so far here. Not because it is really technical nor because it required a lot of research prior, but because it is controversial and I had to be sure that the a...

Simplest Possible Class

Essential Java

class TrivialClass {} A class consists at a minimum of the class keyword, a name, and a body, which might be empty. You instantiate a class with the new operator. TrivialClass tc = new TrivialClass();...

Optional.stream()

Level Up Coding

This week, I learned about a nifty “new” feature of Optional that I want to share in this post. It's available since Java 9, so its novelty is relative. Nowadays, it’s probably more adequate to use…