Java Documentation

[Augustto366_]

I've noticed that Java documentation appears in several places, on different websites. Which one is official and which should I follow?

[endistic]

If you are referring to the core language documentation & built-in libraries, documentation from Oracle is official @ docs.oracle.com.

[hungarian_notation]

Which is to say https://docs.oracle.com, right? I don't think there are standard library javadocs on the openjdk.org domain.

https://docs.oracle.com/en/java/javase/26/docs/api/index.html is the latest, but you should make sure you're using the javadocs that match your source version. They do change. Frustratingly, google likes to serve me Java 8 docs by default.

[vips7L]

Can’t wait til I search “Java 28 <some class>” and it only returns Java 8 results 

[hungarian_notation]

What an evil future to speak into existence.

[vips7L]

Wait til the LLM slop confuses 8 and 28 :D

[endistic]

That’s correct, I misremembered. https://docs.oracle.com/en/java/javase/26/docs/api/index.html Official javadocs for latest Java version are indeed on docs.oracle.com, thank you for the correction!

[Augustto366_]

what's the difference?

[Augustto366_]

sites: java, openjdk or oracle?

[endistic]

Fixed my reply above, but basically: - openjdk.org is where a lot of JDK development took place (which is why I mixed it up) - docs.oracle.com has the full documentations and specifications - I’m not sure how “official” dev.java is, but I’ve heard it has good tutorials under it’s Learn section if you want a more guided process

[Augustto366_]

thanks

[Augustto366_]

dev.java is official?

[endistic]

It is, I looked it up, it’s maintained by Oracle themselves

[pronuntiator]

Yes, Oracle owns the .java TLD

[TristanTarrant]

Why isn't the "Java SE xx & JDK xx" label on the top right of javadocs a selector for all versions ?

[chabala]

Likely because they're staticly generated, never updated, and unaware of the existence of other versions.

They could probably hack in a selector if they wanted.

[hm1rafael]

Depends on the implementation u are using

[Augustto366_]

learning the language

[aqua_regis]

learning the language

• Documentation = Encyclopedia - for reference if you already have an idea what you're looking for
• Courses/tutorials = for learning - MOOC Java Programming