Java Enterprise System includes a number of locally installed shared libraries upon which many system service components and service quality components depend. Java ESshared components provide local services to Java ES components running on the same host computer.
Shared components are often used to provide portability across different operating systems. Examples of Java Enterprise System shared components include: Java 2 Platform, Standard Edition (J2SETM platform), Netscape Portable Runtime (NSPR), Network Security Services (NSS), Network Security Services for Java (JSS), and so forth. For a complete list, see Shared Components.
Shared components are installed automatically by the Java ES installer depending on the system service and service quality components that are being installed.