Simulation modeling is an ideal domain for the application of object-oriented methods, both in the modeling of problem domain entities and in the implementation of simulators. This paper describes a prototype development of an object-oriented, animated, general purpose discrete-event simulation language which builds on the well established entity modeling notations of JSD and harnesses the object-oriented features provided by Java to produce a high-level graphically defined simulation language providing customizable animations in a platform-independent way. Simple situations can be modeled quickly and simply, without the need for programming, whilst the provision of a programmatic API, coupled with the ability to extend the pre-defined Entity class with the addition of Java methods permits a flexible approach to handling more complex systems. In addition to performance evaluation simulations, the provision of user interaction through customizable control panels allows the simulator to be used in a gaming or training mode.