Java Resources

Gatherers in Java: What They Are and Why They Matter

With Stream API, developers could only customize terminal operations using Collector. Stream Gatherers allow developers to define custom intermediate operations.

November 11, 2025

by Ammar Husain

CORE

· 4,944 Views · 8 Likes

The JVM Pause That Wasn't: A War Story

A high-throughput Java service was stalling. The culprit? Stop-the-World GC pauses were blocked by synchronous log writes to a busy disk.

November 6, 2025

by Nataraj Mocherla

· 3,552 Views · 11 Likes

JPlus: A Modern Java Superset Language

JPlus is a modern Java superset that introduces null-safety and boilerplate code-generation syntax while preserving Java compatibility.

November 5, 2025

by Cheol Jeon

· 3,171 Views · 2 Likes

Top Takeaways From Devoxx Belgium 2025

In October 2025, Devoxx Belgium showcased its 22nd edition, emphasizing Java and AI advancements. Sessions covered were AI workflows, architecture decisions, and more.

November 4, 2025

by Gunter Rotsaert

CORE

· 1,566 Views · 3 Likes

Building Reactive Microservices With Spring WebFlux on Kubernetes

Spring WebFlux on Kubernetes delivers high-throughput, low-latency I/O with fewer resources using reactive IO, Resilience4j, and metrics-based autoscaling.

October 30, 2025

by Mikhail Povolotskii

· 4,208 Views · 1 Like

Writing (Slightly) Cleaner Code With Collections and Optionals

See how utility methods provided by Kilo's Collections and Optionals classes can help you write more readable and maintainable Java code.

October 27, 2025

by Greg Brown

· 2,657 Views · 1 Like

Set Up Spring Data Elasticsearch With Basic Authentication

Guide to configure SSL communication with Elasticsearch via Spring Data Elasticsearch. Additionally, the communication is secured with BASIC authentication.

October 27, 2025

by Arnošt Havelka

CORE

· 2,036 Views

Diagnosing and Fixing a Page Fault Performance Issue With Arm64 Atomics

Atomic Arm64 instructions like ldadd can trigger double page faults, fragmenting huge pages and slowing memory warm-up. Learn why and how to fix it.

October 24, 2025

by Dave Neary

· 2,621 Views · 3 Likes

Ranking Full-Text Search Results in PostgreSQL Using ts_rank and ts_rank_cd With Hibernate 6 and posjsonhelper

Learn how to rank PostgreSQL full-text search results by relevance using ts_rank, ts_rank_cd, and Hibernate’s Criteria API for better search UX.

October 23, 2025

by Szymon Tarnowski

CORE

· 3,111 Views · 3 Likes

Applying Domain-Driven Design With Enterprise Java: A Behavior-Driven Approach

Learn how to combine DDD and BDD in enterprise Java to create software that models real business domains and validates behavior through executable scenarios.

October 23, 2025

by Otavio Santana

CORE

· 4,567 Views · 5 Likes

MultiCloudJ: Building Cloud-Agnostic Applications in Java

MultiCloudJ is an open-source Java SDK from Salesforce helping developers to write their application once and run anywhere.

October 20, 2025

by Sandeep Pal

· 4,132 Views · 3 Likes

Infusing AI into Your Java Applications

An introductory tutorial for Java developers on writing AI-infused applications using Quarkus with LangChain4j. You don't need Python to write AI apps.

October 10, 2025

by Don Bourne

· 6,027 Views · 10 Likes

Diving into JNI: My Messy Adventures With C++ in Android

JNI is powerful but tricky. Automate boilerplate with generators, carefully manage references, test with CheckJNI, and embrace the chaos; it gets satisfying.

October 10, 2025

by Ruslan Vidzert

· 3,334 Views · 3 Likes

Introduction to Spring Data Elasticsearch 5.5

Getting started with the latest version of Spring Data Elasticsearch 5.5 and Elasticsearch 8.18 as a NoSQL database for our data storage.

October 10, 2025

by Arnošt Havelka

CORE

· 2,933 Views · 2 Likes

Building Realistic Test Data in Java: A Hands-On Guide for Developers

Learn how to build a simple API that delivers believable fake users, perfect for testing, demos, or UI prototyping. No more “John Doe” data, finally, real-feel mocks.

October 10, 2025

by Wallace Espindola

· 3,146 Views · 8 Likes

Efficiently Reading Large Excel Files (Over 1 Million Rows) Using the Open-Source Sjxlsx Java API

The primary objective of this article is to prevent the "out of memory-Java heap issue" when reading large Excel files using the open-source "sjxlsx" library.

October 9, 2025

by Mahendran Chinnaiah

· 6,764 Views · 7 Likes

Converting ActiveMQ to Jakarta (Part III: Final)

This is the final blog post in a series covering the conversion of Apache ActiveMQ to Jakarta EE and JDK 17 to share best practices with enterprise software developers.

October 8, 2025

by Matt Pavlovich

· 2,291 Views

Building a Real-Time Data Mesh With Apache Iceberg and Flink

Build a real-time data mesh using Apache Iceberg for scalable, versioned table storage and Apache Flink for continuous stream processing across domains.

September 26, 2025

by Subrahmanyam Katta

· 2,766 Views · 2 Likes

Top 7 Mistakes When Testing JavaFX Applications

Testing JavaFX programs may seem non-trivial at first. This article describes the most common mistakes when testing desktop apps, their causes, and solutions.

September 24, 2025

by Catherine Edelveis

· 4,176 Views · 1 Like

Think in Graphs, Not Just Chains: JGraphlet for TaskPipelines

JGraphlet is a tiny, zero-dependency Java library for building task pipelines. It uses a graph model where you define tasks as nodes and connect them.

September 22, 2025

by Shaaf Syed

· 1,594 Views · 1 Like

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