Hello Abhinav,
Are we talking about the Application Server (J2EE engine) Java's JVM?
For 7.1 or higher systems: open http://<host>:<port>/nwa/sysinfo -> "System Information" -> Select the "Instance" -> the JVM information will be displayed below.
For 7.0 systems: open http://<host>:<port>/nwa -> System Management -> Configuration -> Select the "Instance" -> see the the java.path
Note: the "java -version" CLI command does not necessarily shows the J2EE engine's JVM information.
Best Regards,
Peter