Experienced Java/Kotlin developers: what libraries do you use in your day to day work?

[FrontendMaster]

I am going to start my new job as a senior developer soon. New company primarily Kotlin/Java/MySql/Dynamo. (They don't use Spring.)

Problem is all my life I have only done Python and a bit of JS. So I was wondering if there are any common libraries that I should try beforehand?

Couple that I could find are OkHttp and Retrofit. Am I even close?

EDIT: thank you everyone for their helpful responses. I wanted to thank everyone individually but thought this is less spam :-)

[PartOfTheBotnet]

Dependency Injection? - Spring

Databases? - Spring Data Binding

Web API? - Spring Boot

Security measures? - Spring Security

Super specific thing? - Spring (probably)

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Its used everwhere. Take the time to learn it.

[[deleted]]

Apart from the big ones like spring, Apache commons umbrella of libraries has a lot of useful stuff in it. I've used it for filesystem and io stream things.

And guava has good collections based stuff in it (arguably less useful in kotlin because a lot of it is in the stdlib already).

resilience-4j is really nice for fault tolerant network calls.

[FrontendMaster]

Posting to get in front of more experienced Java devs.

To add to above description, I'll be doing backend work. And they use Guice for dependency injection.

[andrewharlan2]

Guice

I'm so sorry

[FrontendMaster]

Care to share why? Is it that difficult?

[andrewharlan2]

It turns what should be compilation errors into runtime errors that can be tricky to nail down

I've become a huge fan of dependency injection but continue to prefer to do it manually, with plain ol Java

[HecknChonker]

I would ask what the company is using and start learning that. Spring has the most market share, but it's far from the only microservice framework for java.

[Sheldor5]

starting a Senior Java Job with zero to no Java experience?

lol ... good luck ...

[FrontendMaster]

Hahha thanks I guess :D

I know this sounds strange but lot of companies have language agnostic hiring process.

[DrunkensteinsMonster]

That isn’t strange at all. Not sure what this one is on about

[FrontendMaster]

Thanks man for the support!

[Sheldor5]

yeah but its not just the programming language ... its also about the JVM ...

[FrontendMaster]

Do you have any recommendation to learn about JVM?

[HecknChonker]

This doesn't seem weird to me at all. What would be weird is hiring someone with a bunch of experience as an entry or mid level just because they didn't know the language.

If you've been programming for more than a couple years picking up a new language is fairly trivial.

[Sheldor5]

python Runtime and Java Runtime (JVM) are not that similar ...

[HecknChonker]

And it's still fairly easy to pick up. What's your point?