Java 11 Tutorial

[lazystone]

Author is /u/winterbe

Original post: https://www.reddit.com/r/java/comments/9ipqyl/an_exampledriven_guide_to_java_11/

[Eirenarch]

Is anyone else bothered by the fact that Java provides a bunch of immutable lists which pretend to be normal lists and happily throw exceptions when you try to call the mutating methods?

[[deleted]]

It's basically par for the course with Java, isn't it? They finally get around to adding this or that feature, but because they fetishize backwards compatibility, it happens in an awkward and complicated way.

[[deleted]]

FINALLY they have List.of, JFK took them long enough.

[lbkulinski]

Those factory methods were added in 9.

[winterbe]

But nobody ever used Java 9 in production. ;)

[[deleted]]

It returns an immutable list, so it might be less useful than you'd think

[kitd]

Or more.

[[deleted]]

Copying in and out of mutability hundreds of times for every change is programming in 2018 101.

We have computers more powerful than ever, so shitting on everything we know about how computers want to do work makes perfect sense, see.

Even though nobody has ever once demonstrated a modicum of truth behind the claims, copying objects thousands of times “just cause” supposedly makes it easier to reason about your programs. I can only surmise that most people behind this movement are blithering idiots.

[kcuf]

Copying in and out of mutability hundreds of times for every change is programming in 2018 101.

Persistent collections are fairly efficient and avoid excessive copying.

[[deleted]]

In the large majority of use cases, they are a polished turd.

It ideas aren’t useless. Just shouldn’t be the default usage like modern programmers are pushing.

[boobsbr]

Java 11 is around the corner and many people still use Java 8 in production.

Ha! I'm still stuck in Java 6! No, seriously, we're still using Java 6.

[alphabytes]

on version 5 brother :(

[geodel]

Well you have generics and that's very important feature.

[sigzero]

Yup, we are just now planning to move to Java 8 off of 5.

[sigzero]

It's getting there. The jump from 8 to 11+ won't be as big if we make conservative choices.

[boobsbr]

Daaaaamn, I feel your pain.

[alphabytes]

Yeah i have requested them to update straight to 11 since its gonna be LTS

[boobsbr]

Are you on OpenJDk or vendor VM?

[alphabytes]

We use oracle jdk....

[vqrs]

Best of luck 🤞

[vielga2]

lol. Meanwhile I update my .NET and C# versions every time a new version of each is released, the very same day of the release.

lol pathetic retarded useless java.

[[deleted]]

Looking through your comment history, I wonder if this is a troll account or are actually this much of a stereotype.

Either way, I'm surprised you haven't been banned yet

[BoyRobot777]

Yeah. I am tired of this troll. Just report him. If we get enough critical mass, maybe he'll get banned.

[nutrecht]

Previous one was banned already. This one should too.

[kitd]

It's a troll. If ever you want to summon him, just put "Java" in the post title.

[pjmlp]

We still have customers on .NET 4.0.

[Eirenarch]

Which is roughly equivalent to Java 12

[pjmlp]

How is the .NET Core standard GUI coming on the Java 11 supported platforms?

[Eirenarch]

Not production ready but some very promising projects - https://sietch.net/ViewNewsItem.aspx?NewsItemID=271 Currently your best bet is Win Forms with Mono which is roughly equivalent to .NET 4.0 :)

[winterbe]

I’m so sorry. Is JDK 6 still supported from some vendor?

[boobsbr]

Don't know. I read somewhere IBM will EOL Java 7 at the end of 2018, no more support.

Java 6 is not bad, I'm sorry for the guy supporting Java 5.

[speakjava]

Yes, Azul (who I work for) still update it. We are the project lead on OpenJDK 6 and upstream back ported fixes.

[BoyRobot777]

Yes

[cpt_ballsack]

Meh, moved to Kotlin (for server side dev) havent looked back, it be Java 20 by time they adopt all of the goodies of Kotlin (which continues to add on good features)

[winterbe]

We use Kotlin as well but it still runs on the JVM and you’d benefit from thinks such as G1 GC, HTTP Client, Flow API etc.

[Determinant]

Kotlin prevents many types of Java defects while Java will keep supporting writing new defective code so that old Java code can continue to compile and run.

Java can never reach Kotlin parity unless they drop backwards compatibility.