Java on IBM i
Java on IBM i is a technology platform that enables the execution of Java applications on IBM i (formerly AS/400 or iSeries) servers, which are midrange systems known for reliability and integration with legacy RPG and COBOL applications. It provides a Java Virtual Machine (JVM) and runtime environment optimized for the IBM i operating system, allowing developers to build modern, cross-platform applications while leveraging existing IBM i resources like databases and security features. This platform supports various Java versions and integrates with tools like IBM Rational Developer for i (RDi) for development and deployment.
Developers should learn Java on IBM i when working in environments that require modernizing legacy IBM i systems, such as in industries like finance, manufacturing, or healthcare where these servers are prevalent. It is useful for creating web services, graphical user interfaces, or mobile backends that interact with existing RPG or DB2 databases, enabling organizations to extend their IBM i investments without full rewrites. This skill is particularly valuable for roles involving enterprise application integration, system modernization, or cross-platform development on IBM i infrastructure.