Parametric classes come with non-trivial subtleties even in the paradigm of orthogonal persistence. Orthogonal persistence guaran- tees that objects of any type, including class objects, may persist. But a parametric class is not a Java type, and its class object does not exist. Further subtleties in the Java technology extended with orthogonal per- sistence are caused by the existence of both the persistent store and Java class files. Neither store was designed with parametric classes in mind. This paper presents a technique for implementing parametric classes in the Java technology extended with orthogonal persistence. The techni- que is based on a suitable representation of a parametric class as a Java class file, an extended class loader which handles instantiation of such a class, and an extension of the Java Core Reflection classes. Extending these final classes is a non-trivial experiment and requires complete re- compilation of the Java system. The overall effect amounts to a new Java Virtual Machine that extends the standard one. However, this extension does not affect correct performance of Java programs.