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Java

Posted by José Guerrero
José Guerrero
6,195 Points

Advantages and disadvantages of singletons in Java.

I'm new in this and it gets really dificultr to understand when should I use them and when I shouldn't.

Alexander Nikiforov
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Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

I just wanted to add to this answer, that "Singleton" is also one of so-called Design Patterns.

Craig has an introduction to Design Patterns in this course:

https://teamtreehouse.com/library/introduction-to-design-patterns

And he talks a bit about "Singleton" in this video

https://teamtreehouse.com/library/creational

Make sure you check his teacher's notes. He always puts nice info about the course there

1 Answer

Evan Demaris
Evan Demaris
64,262 Points
Evan Demaris
Evan Demaris
64,262 Points

Hi Jose,

Singletons are generally frowned upon as they violate the single responsibility principle, are a global instance, and defy encapsulation, among other issues. Knowing how to work with Singletons is good, because you will encounter them, but many, many developers believe they should never be used because of the previous arguments (among many others).

Hope that helps!