Core Java Archives - Java Code Geeks javacodegeeks.com

The Hidden Cost of Records: When Java Records Break Your Serialization, JPA, and Reflection-Heavy Code

javacodegeeks.com·3w

C# 13 & .NET 9 vs Java 25: The Feature Gap Has Closed — Now What?

javacodegeeks.com·3w

Java Time API: Converting Between Date and Instant

javacodegeeks.com·3w

Java’s Memory Model Is Not What You Think: The Gap Between the JMM Spec and the JIT’s Actual Guarantees

javacodegeeks.com·3w

Structured Concurrency and the Death of CompletableFuture Hell

javacodegeeks.com·3w

Kotlin 2.x vs Java 21+The Language Choice for New JVM Projects

javacodegeeks.com·4w

Sealed Classes and Exhaustive Pattern Matching: How They Change API Design, Not Just Syntax

javacodegeeks.com·4w

Java Module System in 2026: Still Ignored, Still Relevant

javacodegeeks.com·4w

The Object Allocation Tax: Why Your Java Service Is 40% GC and How the JIT’s Escape Analysis Both Helps and Misleads You

javacodegeeks.com·4w

OpenRewrite: The Automated Migration Tool That’s Quietly Changing How Teams Upgrade Java

javacodegeeks.com·4w

Virtual Threads One Year in Production: What Teams Got Wrong and What Actually Improved

javacodegeeks.com·5w

Java 21 vs Java 25 LTS: The Migration Decision Framework Teams Are Avoiding

javacodegeeks.com·5w

Building Circuit Breakers in Spring Boot with Resilience4j

javacodegeeks.com·5w

JDK 24 Security Updates

javacodegeeks.com·5w

Vector API at Eleven Incubations: Why This API Takes So Long and What’s Blocking It

javacodegeeks.com·5w

The Lies Your JVM Profiler Tells You: Safepoints, Biased Sampling, and WhyYour Hotspot Analysis Is Wrong

javacodegeeks.com·6w

Java Implementation of Frog River One

javacodegeeks.com·6w

HTTP/3 Comes to the Java HTTP Client

javacodegeeks.com·6w

Fixing Java ClassCastException for Comparable Objects

javacodegeeks.com·6w

Structured Concurrency in Java: Why It’s Better Than CompletableFuture — and What It Still Can’t Do

javacodegeeks.com·7w

Log in to enable infinite scrolling