Java Modernization Hub
Practical guides for upgrading legacy Java applications and adopting modern Java features. Migration paths, API guides, and Java 25 LTS planning — all in one place.
Most Java codebases are running on versions that are no longer supported or are missing years of language improvements. These guides cover everything from planning your migration path to adopting the modern Java APIs that actually reduce complexity in day-to-day development.
Migration Guides
Step-by-step paths for upgrading Java versions in real applications.
The Complete Guide to Migrating from Java 8 to Java 17
Practical migration roadmap covering removed APIs, module system changes, new language features, and tooling for automated refactoring across large codebases.
Java 8 to 18: What Actually Matters for Modern Development
A curated look at the most impactful Java changes across 10 major releases — records, sealed classes, text blocks, pattern matching, and the improvements that actually change how you write code.
Automate Migrations with OpenRewrite
Use OpenRewrite to automate API replacements, package renames, and idiom upgrades during Java and Spring Boot migrations. Covers recipe discovery, customization, and dry-run validation.
Java 25 LTS Series
What's coming in Java 25 and how to plan your enterprise upgrade strategy.
Java 25 Enterprise Migration Guide: LTS Upgrade Strategy
How to evaluate and plan a Java 25 upgrade for enterprise applications — compatibility assessment, dependency audit, risk management, and rollout strategy.
Java 25 Performance: How to Achieve 30% CPU Reduction
The JVM improvements in Java 25 that translate to measurable production gains — generational ZGC improvements, JIT enhancements, and benchmark methodology.
Java 25 Compact Source Files: Simplified Syntax
Java 25's new compact source file format removes boilerplate for simple programs, scripting, and teaching contexts. What it is, how it works, and when you'd actually use it.
Modern Java APIs & Features
Practical guides for the APIs that make modern Java genuinely better to write.
Java Stream API: The Complete Practical Guide
Everything you need to use the Stream API effectively — filtering, mapping, collecting, flatMap, parallel streams, and when streams are the wrong tool.
Java Virtual Threads with Spring Boot
Enable Project Loom virtual threads in Spring Boot 3.2+, understand how they differ from platform threads, and measure the throughput gains for I/O-bound workloads.
Harnessing the Power of Immutability in Java
Why immutability matters for correctness and concurrency. Records, final fields, defensive copying, and patterns for writing Java code that is easier to reason about.
Tooling & Developer Productivity
Tools that make Java development faster and maintenance easier.
Three Lombok Annotations You Should Know
@Builder, @Value, and @SneakyThrows — three Lombok annotations that solve real problems. When to reach for them and when Java records are the better choice.
Three Tools to Keep Dependencies Current
Dependabot, Renovate, and the versions-maven-plugin compared for keeping Java project dependencies up to date with minimal manual work.
Need Help Modernizing Your Java Application?
We help engineering teams plan and execute Java version upgrades — from dependency analysis and risk assessment to hands-on implementation and testing.