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Java Articles by Foojay.io

July, 2025

  • 2 July

    Java 21+ Not Working on the Raspberry Pi Zero 2

    Author: Frank Delporte Original post on Foojay: Read More Table of Contents Problem on Raspberry Pi Zero 2Differences Between RPi Zero 2 and RPi 4Changes in Java 21WorkaroundCompare Boards This story is about how “Write Once, Run Anywhere” got broken in a specific use case. It reveals the complexity of maintaining this “Run Anywhere” principle. At the same time, it …

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  • 2 July

    Kotlin adoption inside ING, five years later

    Author: Julien Lengrand-Lambert Original post on Foojay: Read More Table of Contents The share of Kotlin code at INGLooking at trends over timeHow many flavors does a repository contain?And what about newer projects?A message from the communityA word of conclusion TL;DR: Five years after its introduction Kotlin adoption inside ING keeps growing year after year, with a current adoption rate …

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  • 1 July

    Java Virtual Threads in Action: Optimizing MongoDB Operation

    Author: Otavio Santana Original post on Foojay: Read More Table of Contents PrerequisitesStep 1: Create the Product entityStep 2: Create the ServiceStep 3: Expose the Camera APIStep 4: Build and run the applicationStep 5: Test the APIConclusion Virtual threads have become one of the most popular resources in Java and are trending inside the language. Indeed, this resource introduced a …

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June, 2025

  • 30 June

    Foojay Podcast #74: JCON Report, Part 3 – AI, ChatGPT, LLM, ML, RAG, MCP, GenAI, and more!

    Author: Frank Delporte Original post on Foojay: Read More Table of Contents VideoPodcast (audio only)Content Let’s have an AI Bingo and talk about ChatGPT, LLM, ML, RAG, MCP, GenAI, and more! This is part 3 of the interviews recorded at the JCON conference in May. In the previous parts, you learned more about how to be a better Java developer …

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  • 29 June

    JavaFX Links of June 2025

    Author: Frank Delporte Original post on Foojay: Read More Table of Contents CoreApplicationsGamesComponents, Libraries, ToolsPodcasts, Videos, BooksConferencesTutorialsMiscellaneousJFX Central Here is the overview of the JavaFX LinksOfTheMonth of June 2025. You can find the weekly lists on jfx-central.com. Did we miss anything? Is there anything you want to have included in one of the next overviews? Let us know via [email protected]. …

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  • 27 June

    Improve Your Java Applications’ Startup and Compilation Speed with Optimizer Hub

    Author: Frank Delporte Original post on Foojay: Read More Table of Contents What is Optimizer Hub?Is Optimizer Hub required to use ReadyNow?Advantages of using ReadyNow OrchestratorMore advantages of Optimizer HubConclusion This is the fourth blog post in a series on faster Java application warmup with ReadyNow. If you haven’t been following the series, go back to the first blog post, Faster …

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  • 26 June

    How to Identify the Underlying Causes of Connection Timeout Errors for MongoDB With Java

    Author: Rajesh Nair Original post on Foojay: Read More Table of Contents Network Configuration IssuesServer LoadResource Exhaustion App-Side Chaos: Java Threads or Memory Maxed Out, Leaving No Room for New MongoDB Connections Server-Side Crunch: MongoDB Running Out of File Descriptors or Ram on a Shared Host Connection Pool MisconfigurationIncorrect MongoDB URIConclusion Java developers and MongoDB are like Aladdin and the Genie from …

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  • 25 June

    Build a Sentiment Analysis API in Java with Quarkus and Local LLMs

    Author: Markus Eisele Original post on Foojay: Read More Table of Contents What You’ll Build Prerequisites Bootstrap Your Quarkus Project Configure Ollama and Dev Services Define the Sentiment Enum Create the AI Classification Service Expose the Sentiment API Run It! Test It! Final Thoughts What’s Next? In a world full of opinions, tweets, reviews, chats, emails, understanding the tone behind …

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  • 24 June

    Benchmarking and profiling Java with JMH

    Author: David Vlijmincx Original post on Foojay: Read More Table of Contents Introduction: Why JMH?DependenciesCreating your first benchmarkBenchmark modesState management Keeping the state correct Using state to create variants. Understanding JMH outputPrevent dead code optimizationsConstant foldingUsing async profiler with JMHBonus: Linux toolsConclusion Introduction: Why JMH? Performance matters in Java applications, but measuring it accurately is harder than you might think. …

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  • 24 June

    Clean and Modular Java: A Hexagonal Architecture Approach

    Author: Ricardo Mello Original post on Foojay: Read More One of the discussions that always leaves me with both doubts and excitement is the one about system architecture. Ever since I started diving deeper into programming, I’ve encountered questions like how to separate packages and modules: is it really worth creating so many divisions? I must admit, it’s often complicated …

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