Behaviour processors: layers between end-users and Java virtual machines

Visual programming approaches are limited in their usefulness if they do not include a profile of their users that defines exactly who is attempting to solve what kind of problems using which tools and why. Without such a definition, visual programming approaches can end up as solutions in search of problems. Reconceptualizing-programming environments as layered behaviour processors in the context of creating SimCity^TM like interactive simulations-makes end user programming more feasible. The layered approach serves the programming needs for a range of users, including casual computer end users and professional programmers. The extension of the Agentsheets system with the Ristretto^TM agent to Java bytecode compiler is used to illustrate how a behaviour processor enables end users to create their own Java applets that can be embedded into Web pages