The CICS® Java™ Developer Guide provides help and guidance on developing and deploying Java applications in to CICS using the CICS Explorer® SDK. The CICS Explorer SDK provides samples that show you how to use the JCICS classes, how to combine Java programs with CICS programs written in other languages, and how to include the programs in a CICS bundle project.
You can find more information about using Java applications in CICS in the Developing Java applications for CICS in the CICS TS 5.1 Information Center.