Java Resources

Differential Flamegraphs in Java in Jeffrey Microscope

How to set up a secondary profile and pinpoint the precise frames responsible for a performance change between two JFR recordings.

July 14, 2026

by Petr Bouda

CORE

· 2,116 Views · 1 Like

Jeffrey Microscope for Generating Flame Graphs in Java

Jeffrey Microscope is a deep analyzer for JFR recordings, with a particular focus on flamegraphs generated from stacktrace-based events

July 13, 2026

by Petr Bouda

CORE

· 2,719 Views · 1 Like

Your Codename One App, Now A Native Mac App

Learn how Codename One 7.0.250 brings native macOS app builds, desktop integration, native menus, and improved desktop UX.

July 10, 2026

by Shai Almog

CORE

· 2,439 Views · 1 Like

Exploring A Few Java 25 Language Enhancements

Brief and with practical code examples that raise developers' curiosity and interest in exploring these language enhancements in detail.

July 10, 2026

by Horatiu Dan

CORE

· 2,706 Views · 2 Likes

HTTP QUERY in Java: The Missing Method for Complex REST API Searches

HTTP QUERY gives Java REST APIs a cleaner way to handle complex searches with request bodies, avoiding long URLs and POST misuse while keeping reads explicit.

July 6, 2026

by Otavio Santana

CORE

· 2,335 Views

OBO SSO in Java Applications: Securely Calling Downstream APIs on Behalf of a User

OBO (On-Behalf-Of) allows a Java API to securely call downstream services using the authenticated user's identity instead of the application's identity.

July 3, 2026

by Muhammed Harris Kodavath

· 1,889 Views · 3 Likes

Dead Letter Queue Patterns in Apache Flink: Handling Poison Messages Without Stopping Your Stream

A poison message can trap a Flink job in a restart loop. Use side outputs, retries, tiered DLQs, durable sinks, and replay jobs to keep the stream running.

July 2, 2026

by Rohit Muthyala

· 2,965 Views

Jakarta NoSQL: Why JPA Is Not Enough for the AI Era

Jakarta NoSQL provides a familiar Java programming model while preserving the strengths of document, graph, key-value, and AI-driven vector databases.

June 19, 2026

by Otavio Santana

CORE

· 2,310 Views · 1 Like

From printTriangularNumber to Duff’s Device: Mastering Java Switch Statements Old and New

This post traces that journey using triangular number computation as a practical example of intentional fall-through and connects the technique to Duff's Device.

June 19, 2026

by NaveenKumar Namachivayam

CORE

· 1,824 Views · 2 Likes

Top Java Security Vulnerabilities and How to Prevent Them in Modern Java

Most Java security breaches stem from preventable coding mistakes. Follow secure coding practices, validate inputs, and keep dependencies updated to reduce risk.

June 18, 2026

by Muhammed Harris Kodavath

· 2,959 Views · 1 Like

OpenAPI, ORM, SVG, and Lottie

Learn about Codename One's latest release with OpenAPI code generation, SQLite ORM, SVG and Lottie support, deep links, and routing.

June 17, 2026

by Shai Almog

CORE

· 4,483 Views · 1 Like

On-Device Debugging and JUnit 5

A walk-through of the new JDWP-based on-device debugging pipeline for ParparVM iOS apps and Android apps, with a step-by-step IntelliJ tutorial for each.

June 17, 2026

by Shai Almog

CORE

· 2,778 Views · 1 Like

A Spring Boot App With Half the Startup Time

Learn how Project Leyden and AOT caching can cut Spring Boot startup time in half, improving Kubernetes scaling and application responsiveness.

June 12, 2026

by Sven Loesekann

· 3,935 Views · 3 Likes

Implementing the Planning Pattern With Java Enterprise and LangChain4j

Learn how to implement the Planning Pattern with Enterprise Java, Jakarta EE, CDI, and LangChain4j, enabling AI to transform business goals into executable workflows.

June 12, 2026

by Otavio Santana

CORE

· 2,517 Views · 1 Like

Native SQL in Java Without JDBC Boilerplate — Meet Ujorm3

Ujorm3 eliminates JDBC boilerplate without a full ORM. Write native SQL with named parameters, get objects back — including nested relations.

June 11, 2026

by Pavel Ponec

· 2,787 Views · 5 Likes

Rust-Native Alternatives to Spark SQL and DataFrame Workloads

Sail is an open-source computation framework that serves as a drop-in replacement for Apache Spark (SQL and DataFrame API) in both single-host and distributed settings.

June 11, 2026

by Srinivasarao Rayankula

· 3,138 Views · 3 Likes

Skills, Java 17, and Theme Accents

Java 17 is the new Initializr default; generated projects ship an AGENTS.md authoring skill that any AI agent can pick up.

June 5, 2026

by Shai Almog

CORE

· 2,454 Views · 1 Like

Liquid Glass, Material 3, and a Lot of Plumbing

New iOS Modern (liquid glass) and Android Material 3 native themes, how they work in the Playground, in the simulator, and on devices, plus a week of performance and look

June 4, 2026

by Shai Almog

CORE

· 2,402 Views · 3 Likes

Getting Started With Agentic Workflows in Java and Quarkus

A step-by-step tutorial on how to add agentic workflows to Quarkus applications with the Agentican framework via YAML and annotations.

June 3, 2026

by Shane Johnson

· 3,256 Views · 5 Likes

Building AI-Powered Java Applications With Jakarta EE and LangChain4j

Integrate AI into Java apps with Jakarta EE, CDI, MicroProfile Config, and LangChain4j. Build AI services from simple prompts to type-safe domain-driven interactions.

June 3, 2026

by Otavio Santana

CORE

· 4,565 Views · 2 Likes

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