Java XX Release: New Features and Performance Improvements

New Java Release Is Out: Overview of Key Changes

The developer community has welcomed the long-awaited release of Java XX (version number). This update, which arrives strictly on schedule, brings a number of significant improvements aimed at boosting performance, simplifying development, and enhancing security. In this article, we will break down the most important innovations that every Java developer should know.

Major Changes in the New Release

The new version of Java continues the trend of evolutionary platform development. Developers from Oracle and OpenJDK focused on three key areas: improving multithreading, expanding the standard library, and increasing code writing convenience.

• Refinement of Virtual Threads (Project Loom). Although virtual threads were introduced in previous versions, they have achieved stable status in the new release. This is now a full-fledged feature, not an experimental one. Developers can create millions of lightweight threads without worrying about overhead. This is a revolutionary change for server applications and microservices, where traditional threads were a bottleneck.
• New Methods in String and Collections. Convenient utilities have been added to the standard library. For example, the String::countMatches method for counting substring occurrences has appeared, as well as new overloads for Collectors that simplify data grouping. This allows writing more readable and concise code without using third-party libraries like Apache Commons.
• Improvement of Pattern Matching. The switch construct has become even more powerful. It now fully supports complex patterns with nested records and conditions. This reduces the amount of code when processing object hierarchies and makes business logic more transparent.

Performance and Security

Java developers are not forgetting about the platform's "internals" either. The new release includes significant work on optimizing the G1 (Garbage First) garbage collector. Stop-the-world pause times have been reduced by an average of 15-20% for large heaps. This is critically important for real-time applications and high-load systems.

Additionally, default cryptography algorithms have been updated. Outdated and insecure ciphers (for example, some variants of RSA and SHA-1) are now disabled by default. Developers are advised to check their application configurations if they use outdated protocols.

Why Should You Upgrade?

Moving to the new version of Java is not just about following trends. It is a direct path to reducing infrastructure costs (thanks to virtual threads) and decreasing development time (thanks to new syntax constructs). For projects using Java 17 or 21, upgrading to version XX will be relatively painless, as the language team guarantees a high degree of backward compatibility.

We recommend starting to test the new release on test benches today. You can download the distribution from the official OpenJDK or Oracle JDK website. Stay tuned for updates on PythonLib — we will prepare a series of practical guides on working with the new Java features.