IBM Semeru Runtime Certified Edition for z/OS, version 21, is the latest Java SDK release on z/OS, delivering a high performance Java runtime and development kit that supports Java 21 Standard Edition specification. As clients embark on their hybrid cloud and AI journey on IBM z/OS, Java 21 enables clients to use the latest Java language features, improved performance, and enhanced security for their workloads on-premise and across cloud platforms.
IBM Semeru provides an SDK and Runtime Environment for building highly robust, scalable, and reliable modern enterprise applications, and enables Java developers and z/OS clients to use new Java language features and stay current with the Java community. It supports a wide range of Java applications and frameworks, and integrates with popular Java based frameworks and standards. It provides a consistent hybrid cloud development and deployment experience, leveraging Java APIs, libraries, and frameworks.
Features of IBM Semeru Runtime Certified Edition for z/OS 21, include:
- Java Compatibility Kit (JCK) certification as a fully compliant Java product, enabling porting of Java applications developed on distributed platforms to z/OS.
- OpenJDK class libraries, Eclipse OpenJ9 Java virtual machine technology, and performance enhancements.
- Hardware and software stack optimizations to maximize the performance and benefits of IBM Z hardware and middleware.
- z/OS unique value-add security providers that manage access control, maintain keystores, support failover, leverage hardware cryptography including quantum-safe, and significantly accelerate cryptographic operations.
- JZOS Batch Launcher and Toolkit enhancements to run Java applications as batch jobs or started tasks, with direct access to traditional z/OS data and key z/OS system services.
Semeru (Java) 21 on z/OS contains a Java Enhancement Proposal (JEP) 400 implementation that makes UTF-8 the default charset for standard Java APIs across all platforms including z/OS. Clients may have to make changes to their applications. For more details, refer to the migration guide in IBM Documentation.
For the very first time, multiple products across the IBM Z platform are simultaneously providing support for developing Java 21 applications on z/OS on the same day as this general availability announcement. See the latest ecosystem product support on z/OS page.
How to obtain IBM Semeru Runtime Certified Edition for z/OS, Version 21?
IBM Semeru Runtime Certified Edition for z/OS, Version 21 is available for zero license charge through Shopz (5655-JB1) SMP/E, or you can download the non-SMP/E Pax version here. The subscription and service number is 5655-I48.
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