What is SAP Java System?

Application Server (AS) Java provides a Java platform Enterprise Edition 5 (Java EE5) compliant environment for developing and running Java EE programs. With this installation you can run Java EE applications.

The SAP AS Java System consists of three logical layers:

• Java Enterprise Runtime - This layer comprises low-level subsystems that provide functions such as class loading, cluster communication, persistent configuration data management, and so on.
• AS Java System Components - This layer consists of facades, interfaces, libraries and service. These components provide various runtime functions and programming APIs.

• Applications - This layer refers to the applications that are deployed and run on SAP AS Java.

  

  Figure 1 : The SAP Java System architecture