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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...

Optional

Essential Java

Versions [{“Name”:“Java SE 8”,“GroupName”:null},{“Name”:“Java SE 9 (Early Access)”,“GroupName”:null}] Introduction Optional is a container object which may or may not contain a non-null value. If a va...

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...

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();...

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...

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...

Classes

JavaScript from Beginner to Professional

In this chapter, we are going to discuss JavaScript classes. We have seen JavaScript objects already, and classes are a blueprint or template for object creation. So, many of the things discussed here...

Classes

JavaScript from Beginner to Professional

In this chapter, we are going to discuss JavaScript classes. We have seen JavaScript objects already, and classes are a blueprint or template for object creation. So, many of the things discussed her...

What You Might Not Know About Optional

Javarevisited

How did you represent absent values before Optional? Yes, you used null. The code would look something like this:

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…

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...