JRuby 10.0.0.1

JRuby, developed by The JRuby Team, is a robust and versatile implementation of the Ruby programming language atop the Java Virtual Machine (JVM). This innovative software bridges the gap between the dynamic, expressive nature of Ruby and the extensive ecosystem and performance capabilities of the Java platform. By leveraging the JVM, JRuby offers Ruby developers the ability to seamlessly integrate with Java libraries, tools, and frameworks, thereby expanding the potential and reach of Ruby applications.

One of JRuby's standout features is its ability to run Ruby code with impressive efficiency and speed, thanks to the JVM's Just-In-Time (JIT) compilation and garbage collection. This makes JRuby an attractive choice for developers seeking to build high-performance applications without sacrificing the simplicity and elegance of Ruby's syntax.

JRuby excels in environments where interoperability is key. It allows developers to call Java classes and methods directly from Ruby code, providing a seamless bridge between the two languages. This capability is particularly beneficial for projects that require the use of existing Java libraries or need to integrate with Java-based systems, offering a level of flexibility that is hard to match.

Another significant advantage of JRuby is its compatibility with Ruby on Rails, the popular web application framework. JRuby enables Rails applications to be deployed on any Java application server, such as Apache Tomcat or Jetty, thus broadening deployment options and enhancing scalability. This compatibility ensures that developers can leverage the full power of Rails while taking advantage of the JVM's robustness.

JRuby also supports concurrent programming, a feature that is increasingly important in today's multi-core processing environments. By utilizing Java's threading model, JRuby allows developers to write concurrent Ruby applications that can efficiently utilize system resources, leading to better performance in multi-threaded scenarios.

The JRuby Team has ensured that JRuby remains up-to-date with the latest Ruby language features, providing a familiar and modern development experience. The community-driven nature of JRuby means that it benefits from continuous improvements and a wealth of shared knowledge and resources.

In summary, JRuby is a compelling choice for developers who wish to harness the elegance of Ruby while tapping into the power and versatility of the Java ecosystem. Its ability to integrate seamlessly with Java, coupled with its performance benefits and support for concurrent programming, makes it an excellent tool for building scalable, high-performance applications. Whether you're a Ruby enthusiast looking to expand your horizons or a Java developer interested in exploring Ruby's expressive syntax, JRuby offers a unique and powerful solution.

Release notes:

New Release
Security:
jruby-openssl has been updated to 0.15.4, which re-enables hostname verification by default. This addresses CVE-2025-46551 and GHSA-72qj-48g4-5xgx.
[ JRuby full changelog ]