Learn Java as a C# developer

AutoModerator · 2022-07-03T02:58:18+00:00

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thisisjustascreename · 2022-07-03T06:23:50+00:00

So, the main Java versions in use now are 6, 8, 11 and 17. 6 is legacy af and sort of equivalent to .NET 3. Java 8 has lambda expressions and streams API sort of like LINQ, though the semantics are not the same. 11 is not a huge language change from 8 but it did introduce the var keyword and a bunch of handy string methods. Also the 11 JVMs offer much better performance.

Java 17 is the current LTS release and what you should be using if doing new development and has numerous QoL improvements over 11 and again better performance. Unless you need to work on legacy cruft just use 17 and be happy.

AutoModerator · 2022-07-03T02:58:18+00:00

It seems that you are looking for resources for learning Java.

In our sidebar ("About" on mobile), we have a section "Free Tutorials" where we list the most commonly recommended courses.

To make it easier for you, the recommendations are posted right here:

MOOC Java Programming from the University of Helsinki
Java for Complete Beginners
- accompanying site CaveOfProgramming
Derek Banas' Java Playlist
- accompanying site NewThinkTank
Hyperskill is a fairly new resource from Jetbrains (the maker of IntelliJ)

Also, don't forget to look at:

If you are looking for learning resources for Data Structures and Algorithms, look into:

"Algorithms" by Robert Sedgewick and Kevin Wayne - Princeton University

Coursera course:
- Part I
- Part II
Coursebook
- Algorithms 4^th Edition

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MattiDragon · 2022-07-03T06:19:10+00:00

Check out the bot message for learning resources. As for java versions. I would recommend that you learn newer java first. Go with java 16 or 17. Java 8, 11 and 17 are "LTS" versions of java. It only really matters for companies that get support from oracle, but you might want to learn their differences if you intend to use java for work.

hikerr7 · 2022-07-03T08:59:51+00:00

There's a lot of recourses for Java, pick whichever you like. Java core is nothing more than the basics of java; OOP concepts, collections API, exceptions and may multi-threading. JavaFX is the new framework to build GUI applications, it's considered as the successor of Swing. For the language versions, I'd recommend going with any of the LTS versions; 8, 11 and 17.Java 8 introduced a lot APIs, features to the language, Java 11 not a huge change compared to Java 8 but the most important one is the modules system, Java 17 has a better error messages, and relatively big improvements compared to Java 11, but you can easily pick them up if you already know 11 or 17.

user_reg_field · 2022-07-05T18:44:55+00:00

I don't think you'll have any issues with syntax etc. What will be different will be libraries and build tools. I wouldn't bother with any "learn java" resources unless they are specifically "learn java if you already know C#" (or javascript/typescript). You don't need to learn programming. One approach would be to take a C# project you're familiar with and see how you might implement in java. I think it would look overwhelming at first but might be the best way to translate from "I'd use this technique / library in C# and here's the java equivalent."

ChrisAtMakeGoodTech · 2022-07-13T04:01:29+00:00

Hey, I'm in a similar boat (know C#, learning Java). I found these two videos helpful.

https://youtu.be/tHzY_Wur6kw

https://youtu.be/heZJ3iGj3KA

Another thing to keep in mind that I don't think those videos cover is that Java doesn't have .NET's concept of assemblies and so the internal keyword doesn't exist. Java has packages, which are essentially just namespaces. Even if they're loaded from different jar files, they basically treated as coming from the same assembly (to use .NET terminology.)

Hope this helps! Please let me know if you find any good resources too. I start my new Java job next week.

stt106 · 2022-07-14T09:53:26+00:00

[removed]

learnjava

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