#java21
50 JVM Architecture (Java21) Interview questions and answers:

https://tapurl.to/java21jvm
September 19, 2026 at 3:15 PM
Dear Developers 👋

The Google Cloud Shell now defaults to Java21 ☕ You are welcome 🙌

You can always switch back to Java17 by running #$SUDO update-java-alternatives -s java-1.17.0-openjdk-amd64

shell.cloud.google.com
July 23, 2026 at 1:16 PM
Planning your Java certification strategy for 2026? ☕️
Java 11 vs 17 vs 21 vs 25

We broke down the ROI, job market demand, and LTS roadmap for each version: 🔗 www.myexamcloud.com/blog/best-ja...

#Java #Java21 #Programming #SoftwareEngineering #TechCareers #MyExamCloud
Which Java Certification Is the Best Choice in 2026? Java 11, Java 17, Java 21, or Java 25? | MyExamCloud Blog
Read Which Java Certification Is the Best Choice in 2026? Java 11, Java 17, Java 21, or Java 25? on MyExamCloud Blog for tutorials, certification insights, exam preparation guidance, and practical lea...
www.myexamcloud.com
July 22, 2026 at 4:39 AM
取りあえず、Web小説をKindleで読めるようにAZW3形式ファイルに変換する為のサーバーを構築する作業が一端の終わりを見た。
AlmaLinux 10.1、narou_rs、Java21、AozoraEpub3、Calibre(ebook-convert)を使って、6時と18時にWeb周回、差分ダウンロード、AZW3変換を実行して、NASへコピーし、OneDriveへもコピーする。
これで旅先にWindowsパソコンを持って行かなくても良くなった…
さて、次は何をしようかな。
June 2, 2026 at 12:32 PM
不知道为什么chatgpt和deepseek都说zgc占用只多百分之几,java21 mc实测下来占用多太多了,而且zgc在内存不足的时候会特别卡,比g1gc多分配2g堆内存还是个位数帧数
May 4, 2026 at 5:04 AM
/ask このプロジェクトはどういうものでしょうか?
/ask このプロジェクトをJava21+SpringBoot3.5にOpenRewiteを使ってマイグレーションすることは可能?
/code pom.xmlをJava21+SpringBoot3.5にマイグレーションするためのOpenRewiteのレシピを追加してください。
April 29, 2026 at 1:24 PM
The 2026 AI Agent Cheat Sheet.

Moving from Freshers to Agentic Architects isn't just about prompts; it's about system design. Master the P-A-O Loop and the PPA Framework at MyExamCloud.

#AIAgents #AgenticAI #Java21 #MyExamCloud
April 28, 2026 at 3:05 PM
Excited to announce the v1.1.0 release of holiday-calendar-java!

- Expanded data coverage through 2055
- Closed correctness gaps in the Japanese calendars.

🔗 Release: github.com/holiday-cale...
📖 API Docs: holiday-calendar.org/holiday-cale...

#Java #OpenSource #FinTech #Java21 #HolidayCalendar
Overview (Holiday Calendar 1.1.0 API)
module index
holiday-calendar.org
April 26, 2026 at 10:20 PM
今日のニュースはJavaの新しい機能のことニャ!

みんながすごい新しい機能を採用したけど、実際にはどうやらすごく困っているみたいニャ。特に、Java21で導入されたバーチャルスレッドが、同步ブロックの中で固定されて、すべてのキャリアスレッドを消耗してしまって、アプリケーションがぶっ壊れるなんて!Netflixも同じ問題に遭遇したみたいね。
Java Virtual Threads: The Pinning Problem and the Fix in Java 24
I came across an internal engineering writeup at my org where a production service stalled after adopting virtual threads, a feature introduced in ...
reddit.com
April 26, 2026 at 6:00 AM
Which we ack. We understand #Java a little more better and that probably helps our case. All of this on Java21 and I am pretty sure it(vector API)probably got better in 25. And I forgot - Java is slow!
@Java #Performance #machinelearning
March 3, 2026 at 1:06 PM
Virtual Threads make blocking boring again.
That’s a good thing.

This hands-on tutorial shows a real Quarkus service doing image processing with Java 21 Virtual Threads only.
Simple architecture. Predictable behavior.

Read it here 👇
buff.ly/ZbHKDl5

#Java #Java21 #Quarkus #SoftwareArchitecture
January 3, 2026 at 7:15 AM
Создаём мини-фреймворк для MapReduce в Scala с конкретной реализацией Статья демонстрирует построение минималист...

#MapReduce #Scala #java21 #многопоточность #функциональное #программирование #sbt #фреймворк #jvm #bigdata #data

Origin | Interest | Match
December 6, 2025 at 12:17 PM
Exciting news! Java 21+ is now back and fully operational on Raspberry Pi Zero 2. Dive into this tech-filled comeback with @frankdelporte.be 's enlightening piece. Catch up now: foojay.io/today/java-2... #RaspberryPi #Java21
foojay – a place for friends of OpenJDKJava 21+ on Raspberry Pi Zero 2 is Back In Business
foojay is the place for all OpenJDK Update Release Information. Learn More.
foojay.io
December 4, 2025 at 11:59 AM
renovate pushed iaas renovate[bot] bot pushed to renovate/itzg-minecraft-server-java21-graalvm in RazeLighter777/iaas · November 5, 2025 19:50 1 commit to renovate/itzg-minecraft-server-java21-gra...

Origin | Interest | Match
Comparing 78ef0d86b1...031366649a · RazeLighter777/iaas
gf-approved K8S homelab with fluxcd. Contribute to RazeLighter777/iaas development by creating an account on GitHub.
github.com
November 5, 2025 at 7:57 PM
👏🏻👏🏻👏🏻 Curiosidade, porque não foi para o Java21?
October 28, 2025 at 4:58 PM
CleanroomMCを使うとJava21で1.12.2が動くんだね
その代わりにLiteloaderが動かなくなるw
October 26, 2025 at 10:44 AM
public static void main(……
をかくのが面倒に感じられなければJavaもできると思いますかちゃ〜
(なおJava21で書かなくてもよくなっちゃそうですが)
October 15, 2025 at 10:29 AM