We wrote this IBM Redbooks publication for clients who implement the Java language support that is provided by CICS Transaction Server for z/OS V3.2. Our prime audience is CICS and z/OS system programmers who provide support for Java application development and Java application programmers who need a gentle introduction to Java development for CICS. In this book, we assume that you have knowledge of z/OS, CICS, UNIX System Services, and Java. We start by reviewing the basic concepts of the z/OS, CICS TS V3.2, and Java environments, and introduce new terminology. We then discuss the software and hardware requirements for developing and executing Java applications in CICS TS V3.2. Next we show you how to customize the application development environment, UNIX System Services, MVS, and CICS. Additionally, we briefly discuss three possible application development roadmaps: Java application programs that use CICS services, IIOP server applications, and CICS Enterprise Beans.