JRE Components

The JRE is the software environment in which programs compiled for a typical JVM implementation can run. The runtime system includes:

• Code necessary to run Java programs, dynamically link native methods, manage memory, and handle exceptions

• Implementation of the JVM

The following figure shows the JRE and its components, including a typical JVM implementation's various modules and its functional position with respect to the JRE and class libraries.

Figure 1-1 Typical JVM's Implementation: Functional Relationship to JRE and Class Libraries