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☕Java

TutorialJava

JDK 27 Is Here: What You Get Just by Upgrading (and What Needs --enable-preview)

JDK 27 went GA on 15 September 2026 with 9 JEPs. G1 everywhere, compact object headers, post-quantum TLS and JFR redaction change behaviour with zero code changes; lazy constants, primitive patterns, structured concurrency and the PEM API are previews. What each one means, with working Java examples.

Chaturmind TeamSep 29, 2026

☕Java

Tutorial

Java

Java Garbage Collection Explained: G1, ZGC and How to Choose

How the JVM finds garbage, why generations matter, what G1 and ZGC actually do, and a practical way to pick and tune a collector for your service.

Chaturmind TeamSep 26, 2026

☕Java

TutorialJava

Virtual Threads in Java 21: When They Help and When They Don't

Virtual threads make blocking code scale to hundreds of thousands of concurrent tasks — but only for I/O-bound work. How they work, how to use them in Spring Boot, and the pitfalls.

Chaturmind TeamSep 26, 2026

☕Java

TutorialJava

HashMap Internals: How put() and get() Really Work

Buckets, hash spreading, collisions, treeification and resizing — a step-by-step look inside java.util.HashMap, and why equals() and hashCode() must agree.

Chaturmind TeamSep 26, 2026

☕Java

TutorialJava

10 Java Output Questions That Trip Up Experienced Developers

Integer caching, the String pool, finally blocks that override returns — ten short Java snippets where intuition gives the wrong answer, with the exact reason for each.

Chaturmind TeamSep 26, 2026

☕Java

BlogJava

Java Concurrency: The Interview Questions That Trip People Up

volatile, synchronized, ReentrantLock, happens-before — these concepts trip up even experienced engineers. Here's a clear explanation of each.

Chaturmind TeamSep 21, 2026

☕Java

Featured

BlogJava

Java 21: The Features That Matter for Backend Engineers

Virtual threads, record patterns, sequenced collections — Java 21 is a landmark LTS release. Here's what to adopt now and what to watch for in interviews.

Chaturmind TeamSep 21, 2026

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