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MKMurat Kayanbetweenthelayers.hashnode.dev21h ago · 14 min read

Project Valhalla Ships in JDK 28. Your Cloud Bill Won't Notice

Value classes are real. So are the constraints. This is a reality check for Java teams planning a 2027-2030 roadmap. Summary JEP 401 (Value Classes and Objects) went into mainline OpenJDK in July 202

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SLShraddha Landgeexplorewithshraddha.hashnode.dev3d ago · 7 min read

From javac to JVM

When we write a Java program, we write code that humans can understand. But a computer's CPU ultimately works with low-level machine instructions represented as bits (0s and 1s). So, what happens betw

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VMVaishali Malviyajavawithvaishali.hashnode.devAug 3 · 3 min read

Understanding "JDK, JRE and JVM" in java : A Beginner Friendly Guide

If you are starting your Java journey, you have probably heard terms like JDK, JRE, JVM. Many beginner get confused about the difference between them. I will explain JDK, JRE and JVM in simple and eas

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KMKaustubh Mishrakmscratch.hashnode.devJul 5 · 9 min read

Java Variables and Datatypes

Hello! all, a warm welcome to my scratchPad. If you are new to this series and wanna know more about it, as well as my resources and motivation behind it, you can read it up here in the Series Introdu

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RARuhit Armanarmanruhit.hashnode.devMay 28 · 12 min read

Lazy Singletons in Java: Why Double-Checked Locking Needs "volatile", and the Better Alternative That Doesn't

If you've ever read about the singleton pattern in Java, you've almost certainly run into the phrase "double-checked locking," usually followed immediately by a stern warning: don't forget the volatil

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TOTomisin Oladeleteeto.hashnode.devMay 24 · 4 min read

Understanding Heap and Stack Memory

Disclaimer It’s important to note that this topic is broader than what is covered in this article. The goal is to have a basic understanding of the heap and stack memory. Heap Memory Heap memory is sh

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NLNagesh Lakshmana Gowdanageshtech.hashnode.devMay 19 · 4 min read

Java 25 vs Java 21 — What’s New and Why Developers Should Care

Java continues to evolve rapidly, bringing better performance, developer productivity, cloud-native improvements, and modern language enhancements. While Java 21 became a major Long-Term Support (LTS)

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TTuanhdotnettuanhnet.hashnode.devMay 4 · 10 min read

Reasons Java services get slower after a few hours: How to find thread pool saturation?

Source: Reasons Java services get slower after a few hours: How to find thread pool saturation? You boot a service at 03:00 and it behaves beautifully: sub-second responses, healthy throughput. By noon, requests start lagging. After an outage ticke...

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AAAbstract Algorithmsabstractalgorithms.hashnode.devMay 3 · 25 min read

Java 14 to 17: Records, Sealed Classes, Text Blocks, and Pattern Matching

TLDR: Java 14–17 ran a deliberate four-release preview-to-stable conveyor belt. Records replaced 50-line POJOs with one line. Text blocks ended escape-sequence chaos in multi-line strings. Sealed clas

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AAAbstract Algorithmsabstractalgorithms.hashnode.devMay 3 · 22 min read

Java 21 to 25: Virtual Threads, Pattern Matching, and Structured Concurrency

TLDR: Java 21 LTS makes virtual threads a production-ready replacement for bounded thread pools — your newFixedThreadPool(200) can become newVirtualThreadPerTaskExecutor() and handle 10× the concurren

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#jvm

Explore Hashnode

Trending tags this week

Project Valhalla Ships in JDK 28. Your Cloud Bill Won't Notice

From javac to JVM

Understanding "JDK, JRE and JVM" in java : A Beginner Friendly Guide

Java Variables and Datatypes

Lazy Singletons in Java: Why Double-Checked Locking Needs "volatile", and the Better Alternative That Doesn't

Understanding Heap and Stack Memory

Java 25 vs Java 21 — What’s New and Why Developers Should Care

Reasons Java services get slower after a few hours: How to find thread pool saturation?

Java 14 to 17: Records, Sealed Classes, Text Blocks, and Pattern Matching

Java 21 to 25: Virtual Threads, Pattern Matching, and Structured Concurrency