Top Tweets for #Java21
Java versioning is a nightmare โ๐
JDK vs JRE vs JVM. LTS versions. Compiler vs runtime.
UnsupportedClassVersionError. โIt works on my machine.โ
I broke it all down here:
#Java #JavaProgramming #JDK #JRE #JVM #Java21 #Java25 #LTS #Programming #LearnJava #Coding #Developer
https://t.co/issA3dwvli
OAuth2 login isn't enough.
Learn how to build a custom OAuth2UserService and persist users in your database with Spring Security 7, Spring Boot 4, and Java 21.
Read:
https://t.co/csXPJ3Iu5y
#SpringBoot #SpringSecurity #Java21 #OAuth2
Who can access your business logic?
That's exactly what method-level security solves.
Master @PreAuthorize, @PostAuthorize, and @Secured in Spring Boot 4.
https://t.co/5IyBv61bSP
#SpringBoot #Java21 #Backend #ayshriv
Method-level security > endpoint security.
Learn how to use @PreAuthorize, @PostAuthorize, and @Secured in Spring Security 7 with Spring Boot 4 & Java 21.
Read:
https://t.co/5IyBv61bSP
#SpringSecurity #SpringBoot #Java21 #Backend #ayshriv
Method-level security is where real authorization happens.
Learn how to secure your Spring Boot 4 applications with:
โข @PreAuthorize
โข @PostAuthorize
โข @Secured
Read here:
https://t.co/5IyBv61bSP
#SpringBoot #SpringSecurity #Java #Java21 #Backend #Programming #ayshriv
Planning your Java certification strategy for 2026? โ๏ธ
Java 11 vs 17 vs 21 vs 25
We broke down the ROI, job market demand, and LTS roadmap for each version: ๐ https://t.co/EmrEhi78X8
#Java #Java21 #Programming #SoftwareEngineering #TechCareers #MyExamCloud
๐ Learn Java the practical way!
๐ Learning Java (6th Edition) covers Java 21, APIs, real-world examples, and core concepts in a full-colour 552-page guide. Perfect for beginners & professionals alike. ๐ปโ
#Java #OReilly #Programming #Java21 #Coding #Developers
Choosing between writing complex non-blocking pipelines or letting the JVM handle millions of threads for you.
#Java21 #SpringBoot #Backend
Pass Java 21 in your 1st attempt
๐Use the Plan โข Practice โข Achieve (PPA) strategy
โ
Set goals
โ
Practice 30+ mock tests
โ
Track progress
โ
Use AI for revision
Start now ๐
https://t.co/LVOt8kcm5w
#Java21 #JavaCertification #Programming #JavaDeveloper #Coding
In this article, weโll focus on switch expressions, utilizing pattern matching for switches and enums.
Read more ๐ https://t.co/lRi9N1Lo6M
#Java21 #Java #certification
Virtual Threads make blocking boring again.
Thatโs a good thing.
This hands-on tutorial shows a real #Quarkus service doing image processing with #Java21 Virtual Threads only.
Simple architecture. Predictable behavior.
Read it here
https://t.co/iCnKtLH3qy
#SoftwareArchitecture
2025 update: Spring Boot 4 + Java 21 virtual threads = JDBC queries that scale to millions without thread pool drama. Game-changer! โก #SpringBoot #Java21โ ๏ฟฝ๏ฟฝ
Top 100 Java Fresher Interview Questions and Answers (Updated for Java 21 in 2025) + Certification Guide
https://t.co/EZr3kwtTqI
#Java #Java21 #JavaProgramming #JavaDeveloper #JavaCertification #JavaInterview #InterviewQuestions #FresherJobs #CodingInterview #Programming
๐งน Cleaner code, safer APIs: how record-based DTOs remove noise & enforce immutability in Spring Boot 3. #Java21
๐ฅ Traditional threads are heavy. Virtual Threads are lightweight, fast, and ready for your real-world APIs. #SpringBoot #Java21
๐ Java 21's Virtual Threads are here โ but how do you use them in a real-world web app? Letโs make your server async-ready. #Java21 #VirtualThreads
Java 21 Programming Masterclass: Fundamentals for Beginners
https://t.co/B5XVs2dEsR
#bigsale #life #udemy #java #Java21 #ModernJava #CodeBetter #JavaDeveloper #NextGenJava #UpgradeYourJava
๐ Whatโs new in #JakartaEE11?
โ
Java Records & Virtual Threads
๐ Jakarta Data 1.0
๐ Updated specs: CDI 4.1, Security 4.0, Concurrency 3.1
๐งผ Bye JAXB, ManagedBeans
โ๏ธ by @OndroMih & @OmniFishEE
๐ https://t.co/DLWW46vZ0l
#Java21 #JakartaData #VirtualThreads
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