1. A computer-implemented method for creating an execution path for interfacing with a legacy program in a mainframe computing environment, comprising: creating a run-time environment for programs on a mainframe computer by an initiator program, where the programs are written in a high level programming language; initiating execution of a configuration program in the run-time environment by the initiator program, where the configuration program is written in the high level programming language; specifying user-defined parameters for a Java Virtual Machine to the configuration program; and creating a Java Virtual Machine (JVM) in another run-time environment of the mainframe computer, where the JVM is created by the configuration program using the user-defined parameters.