How justified is the use of Guava?

Question

Java

I looked at a couple of interesting methods in the Guava library, but is it worth including it for them?
In theory, apart from a large number of methods, there is nothing wrong with it?
And I also wanted to know which features from this library do you use most often?

Answer 1

Very handy library.
I use Cache, MultiMap, collections.
Than cycling something of your own, it is better to take a ready-made and proven one.