A script could extract the commands necessary to recompute a result from the author's makefile. Since Java main methods can be invoked with a string argument just like any other method. a script can translate the makefile command into an applet's method invocation. I expect that we can write a script that automatically translates even fairly complicated makefile rules to applet methods. In my experience, object-oriented Java applications tend to be accompanied by simple makefile rules. Things that were done by stringing together procedual programs in pipes are implemented as object methods and are invoked within a program.