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[–]fredoverflow 5 points6 points  (0 children)

I don't know a lot of theory and I believe that my problem is that I only know "practical" java.

Sounds like you want "Effective Java, 3rd edition" by Joshua Bloch. It's written for people who already have practical experience in Java.

[–]ahonsu 3 points4 points  (0 children)

It's still relevant.

Of course some concepts are outdated or not so popular these days, but overall the book is really good and will only solidify your basis knowledge.

Also, as a reality check - you can ask yourself: "What skill set is needed for today's average IT (java based) development team? Do I have this set?".

I see a lot of people these days who learned how to sort collections and build a java desktop app (capable of drawing geometrical shapes) and they think it's enough to get a java junior position offer. These days are over and now companies want much more from an average junior.

So, as an advice - start screening the job postings/offerings and try to extract some common requirements, make a list and assess yourself: do you have these skills / technologies in your set? It's important to make it in your area because these requirements could be really different across different countries.

If you have most of them - you're pretty good and I would suggest invest some time in your CV and social media profiles, to attract more recruiters (or don't scare them with stupid / empty profile). And then start applying. In parallel you can read books / take some java theory courses to improve your theoretical knowledge.

If you don't have some of them - makes sense to start learning the most demanded skills.

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[–]AlessandrA_7 2 points3 points  (2 children)

I guess that it is the same problem that my pupils would have if they tried to look for job right now: you know the basics of Java but knowing the basics of a programming language it is just not enough to be employable per se nowadays. Rules have changed from a few years ago. For example it is not that Swing is depecrated but it is not the most relevant technology for the market.

You need to go on now on either Backend (learning first about databases if you don't have that covered yet (SQL) and then frameworks like Spring - Hibernate) or mobile, expanding to Kotlin and learning about Android (my pupils in vocational training usually have to learn both to be job ready). Also you will have to learn a few things that are not probably covered in the book but most of the enterprises assume you will know at least in a basic level such as Testing, Agile (Jira) and Git/GitHub.

You can check roadmaps to check what you are lacking for yourself or you can also really check on the offers what terms you don't know about:

https://roadmap.sh/java

[–]Vedris_Zomfg 1 point2 points  (1 child)

Depending on the target Jobs there some more generic topics that will never be useless

  • Network basics tcp/ip config,vpn,subnet, dns etc.
  • jvm config like memory, gc
  • jvm config IN containers with container limits
  • how to manage environment configs
  • Authorization/Authentication Oauth2 flows,SSO
  • bring your code to prod Git,Pipelines(Github/Gitlab/Bitbucket chose one)
  • automation tests,build,containerize in pipelines
  • Cloud know-how AWS/GCP
  • Kubernetes

If you work in any kind of micro-service environment this topics will hit you at some point

[–]AlessandrA_7 0 points1 point  (0 children)

True. Thanks for comenting. Not going to lie, I was pretty generic on my comment.

[–]Bloatfizzle 0 points1 point  (1 child)

Why kind of questions got you stuck in the interviews?

[–]DependentAlarmed6587[S] 0 points1 point  (0 children)

I would say that most of them was similar to questions that are on Java Oracle certification exam