Java Conference 2025: Main Announcements and Ecosystem News

Java Conference 2025: Main Announcements and Ecosystem News

Last week, the annual Java conference concluded in San Francisco, gathering over 12,000 developers from around the world. The event traditionally served as a platform for key announcements from Oracle, JetBrains, Red Hat, and other industry leaders. This year, the main focus was on performance, simplifying multithreading, and long-term platform support.

Main Announcement: Java 22 LTS

The key event was the official announcement of Java 22 Long Term Support (LTS). The release is scheduled for March 2025. Among the most anticipated innovations:

• Project Loom (stable status) — Virtual Threads finally receive full support. This will allow processing millions of concurrent tasks without overloading the operating system.
• Pattern Matching in switch — the final version of pattern matching for switch constructs, making code more concise and safer.
• Record Patterns — unification of working with Record classes in deconstructors, simplifying complex data analysis.
• String Templates (Preview) — improved string templates with safe escaping and interpolation.

GraalVM 25.0: Breakthrough in Native Compilation

Oracle introduced GraalVM 25.0, which now supports compiling applications into native code with startup acceleration of up to 50 times. For microservice architecture, this means a 40% reduction in memory consumption and a cold start time of up to 10 ms. Special emphasis is placed on compatibility with Java 22 LTS.

Project Leyden: Quantum Leap in Performance

The second day of the conference was dedicated to Project Leyden — an initiative for static analysis and bytecode optimization at the compilation stage. Developers demonstrated a prototype that speeds up the execution of typical enterprise applications by 30% without changing the source code.

Ecosystem: New Tools and Partnerships

JetBrains announced IntelliJ IDEA 2025.1 with a built-in AI assistant for Java, which offers refactoring and Unit test generation. Red Hat, in turn, introduced Quarkus 4.0 — a lightweight framework for Kubernetes with support for Java 22 LTS and GraalVM.

• Spring Framework 7.0 (early access) — full support for virtual threads and reactive applications.
• Micronaut 5.0 — improved integration with Project Loom and AOT compilation.
• Jakarta EE 11 — a new version of the specification with a focus on cloud scenarios.

Results and Prospects

The conference showed that Java is not just maintaining its position, but actively evolving. Virtual threads, native compilation, and AI tools make the language even more attractive for modern tasks — from microservices to Data Science. The release of Java 22 LTS will be a starting point for a new era of performance and development convenience.

Stay tuned for updates on PythonLib — we will prepare detailed guides on all the new Java features for you as soon as the release candidate comes out.