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MMMayank Mahajanmayankdev.hashnode.dev1d ago · 12 min read

Java Explained Simply: Why It Runs Everywhere (and How)

You're about to type System.out.println("Hello, World!");. Wait. Java has powered banks, e-commerce backends, Android tooling and big-data platforms for almost three decades. The reason isn't its synt

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DSDoogal Simpsondoogal.dev3d ago · 5 min read

Inside Java Card: JVM for Battery-Less Microcontrollers

Java Card powers billions of SIM and bank cards using a highly stripped-down JVM designed for battery-less microcontrollers. By flipping traditional memory management on its head, it stores the object

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FMFelipe Maschiomaschiojv.hashnode.devSep 8 · 9 min read

Masking a JVM thread dump without breaking the analysis

A few weeks ago I posted on r/java about detecting virtual thread pinning from a plain thread dump. The technical discussion was fine. The comment that stuck with me had nothing to do with pinning: "t

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MSMd Sharique Alamalambda.hashnode.devAug 26 · 11 min read

The exception in the hot loop — how a caught exception ate our CPU

A backend service I work on started returning 200s. Slow 200s. p99 for one specific endpoint had drifted from a few hundred milliseconds to over eleven seconds. Not a timeout — a legitimate, successfu

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MKMurat Kayanbetweenthelayers.hashnode.devAug 14 · 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.devAug 11 · 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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#jvm

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Trending tags this week

Java Explained Simply: Why It Runs Everywhere (and How)

Inside Java Card: JVM for Battery-Less Microcontrollers

Masking a JVM thread dump without breaking the analysis

The exception in the hot loop — how a caught exception ate our CPU

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