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The Java Dev @The_Java_Dev

Tweeting out the best Java posts from dev.to. Part of the @ThePracticalDev family ❤️

Joined September 2018
  • Tweets 2,702
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  • Followers 5,131
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RT @animesh_kr1: Performance testing often happens too late, when fixing issues is expensive. Explore shift-left with Gatling can fit naturally into automation pipelines using a controlled env and automated thresholds. @ThePracticalDev @springboot @java #DEVCommunity
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Java developers can now build GenAI features without the boilerplate. Learn how to use Genkit Java and Gemini to create strongly typed AI flows with structured output and built-in observability. [ author: @xavidop @GoogleDevExpert } dev.to/gde/it-has-never-been…

It Has Never Been This Easy to Build Gen AI Features in Java

Introduction Building generative AI applications in Java used to be a complex,...

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Stop wasting time on port conflicts and bean configuration crashes. Here is a compilation of common Spring Boot errors and their practical solutions. { author: Akanksha Soni } dev.to/akanksha_soni_fef7854…

I Kept Seeing These Spring Boot Errors — Until I Learned This

Spring Boot makes backend development faster and cleaner, but when something breaks, the error logs...

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Java concurrency has changed. With the introduction of Virtual Threads and a focus on immutability, the way we handle parallelism is revolutionizing. Here is the deep dive. { author: @realDBC4 } dev.to/dbc2201/javas-concurr…

Java's Concurrency Revolution: How Immutability and Virtual Threads Changed Everything!

Explore how Java 25's virtual threads, Scoped Values, and the shift toward immutability are...

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The Java Dev retweeted
Hadil Ben Abdallah@hadilbnabdallah
16 Oct 2025
Wanna know if you are a real JavaScript developer or not? 😅 Check out my latest article on @ThePracticalDev 🔥: You’re a Real @JavaScript Developer Only If... dev.to/hadil/youre-a-real-ja… #Programming #JavaScript #DevCommunity

You’re a Real JavaScript Developer Only If...

Some people say you become a real developer when you build your first app. JavaScript developers know...

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The Java Dev retweeted
Vadym Kazulkin@VKazulkin
11 Jun 2025
New blog post alert 🚨 "@Quarkus 3 application on #AWS Lambda- Part 5 Measuring Lambda cold and warm starts with @graalvm Native Image". #AWS #Serverless #Java @java @ThePracticalDev @The_Java_Dev dev.to/aws-heroes/quarkus-3-…

Quarkus 3 application on AWS Lambda- Part 5 Measuring Lambda cold and warm starts with GraalVM...

Introduction In part 1 of our series about how to develop, run, and optimize a Quarkus web...

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Implementing cdk-nag in Java CDK unit tests 🔹 Apply AwsSolutionsChecks in test setup 🔹 Use CDK Assertions to catch missing security rules { author: @yvthepief } #DEVCommunity #Java dev.to/aws-builders/vibe-cod…
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Day 1 of my 270-day coding journey: diving into Java with a clear roadmap to grow as a creator, thinker and builder. #DEVCommunity #Java dev.to/chakshuisadev/and-my-…

And my 270 days of coding journey began...

The journey of a thousand miles start from a single step. - LAO TZU WHAT I DID TODAY Decided to...

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Walk through fixing a Java cdk-nag test in AWS CDK, using Amazon Q to surface EC23 warnings and enforce security best practices. { author: @yvthepief } #DEVCommunity #Java dev.to/aws-builders/vibe-cod…
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✅ sync.WaitGroup basics: Add, Done, Wait ✅ memory layout tricks and atomic updates ✅ goroutine coordination internals #DEVCommunity #Java dev.to/leapcell/how-does-syn…

How Does sync.WaitGroup Work? A Look into Goroutine Synchronization via Source Code

Leapcell: The Best of Serverless Web Hosting In - depth Analysis of sync.WaitGroup...

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Go’s sync.WaitGroup uses Add, Done and Wait to block main goroutine until subtasks complete, relying on atomic counters and semaphores. #DEVCommunity #Java dev.to/leapcell/how-does-syn…

How Does sync.WaitGroup Work? A Look into Goroutine Synchronization via Source Code

Leapcell: The Best of Serverless Web Hosting In - depth Analysis of sync.WaitGroup...

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Insert and merge a new interval into a sorted, non overlapping list • Single pass O(n), constant extra space • Java code example { author: @vazhathody } #DEVCommunity #Java dev.to/rohithv07/leetcode-57…

Leetcode 57. Insert Interval

Problem Statement You are given an array of non-overlapping intervals intervals where...

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Explore 5 libraries for reading image EXIF data in code, including libheif, exiv2, ExifTool, Leadtools and JDeli. #DEVCommunity #Java dev.to/idrsolutions/how-to-r…

How to read EXIF metadata from Image files

In our previous article we looked at some Viewers which could display Exif data for you. Sometimes,...

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Learn how to cut cold starts in Quarkus 3 Lambdas by priming DynamoDB with AWS SnapStart. Startup median drops to ~650 ms. { author: @VKazulkin } #DEVCommunity #Java dev.to/aws-heroes/quarkus-3-…

Quarkus 3 application on AWS Lambda- Part 3 Reducing Lambda cold starts with SnapStart and DynamoDB...

Introduction In part 1 of our series about how to develop, run, and optimize a Quarkus web...

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Structured string parsing in Java can be brittle with regex or split. StringFormat uses templates for clear, compile-safe extraction. #DEVCommunity #Java dev.to/fluentfuture/parsing-…

The Easiest String Parsing in Java

Parsing structured strings in Java has always been painful. Most developers reach for regular...

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Jargon-free guide to the Prototype Pattern: clone complex objects instead of rebuilding them and manage deep vs shallow copies cleanly. #DEVCommunity #Java dev.to/syedyshiraz/understan…

Understanding the Prototype Pattern – Ctrl C the Right Way

📘 Why This Blog? I used to think cloning objects was just a matter of writing new...

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Java data types in brief: primitive vs reference, literals, type conversion rules and wrappers. Essential refresher for interviews or quick review. #DEVCommunity #Java dev.to/kmartita/java-data-ty…

Java Data Types: A Quick Reference Guide

This article offers concise technical Java notes, covering primitive and reference types,...

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Trace Java’s journey from Sun’s Oak experiment to today’s Write Once, Run Anywhere staple, driven by bytecode and the JVM. #DEVCommunity #Java dev.to/icelink/history-java-…

History Java

Java: From Acorns to Awesome (and How the Heck It Actually Works!) Alright, code crusaders and...

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Java guide to creating a number-guessing game: pick a random 1–100 number, offer 10 attempts and give higher/lower hints. #DEVCommunity #Java dev.to/ramya_kamalasekaran/n…

Number Guessing Game in Java

Guessing the number game: `package com.first; import java.util.Random; import...

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Add Spring Boot integration tests with MockMvc to go beyond unit tests. Learn when to choose @WebMvcTest or @SpringBootTest. #DEVCommunity #Java dev.to/jmohammadmirza/spring…

Spring Boot Integration Testing

Spring Boot Integration Testing You have mastered Junit. You are Mockito maestro.But if...

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