OJVM is the Oracle Java Virtual Machine which gives you the ability to execute JAVA code directly in the database.

OJVM is the Oracle Java Virtual Machine which gives you the ability to execute JAVA code directly in the database.Embedded JVM (OJVM) The embedded JVM runs Java code in user session (within the dedicated or shared server), in the same memory space as SQL and PL/SQL. These Java modules can be invoked by any database client, similarly to PL/SQL modules.