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%T Scriptic: Parallel Programming in Extended Java
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%A  Andr\[`e] van Delft
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%E  Andr\[`e] W. P. Bakkers
%B Proceedings of WoTUG\-20: Parallel Programming and Java
%X Scriptic is an expression based extension to the Java
   programming language, targeted at user interfaces,
   simulations and parallel computing on shared memory systems.
   The extras are mainly founded on the theory of Process
   Algebra: constructs for non\-deterministic choice,
   parallelism and communica\-tion. By default, these parallel
   constructs have interleaving seman\-tics, rather than
   multi\-threading or forking. Specific Java code fragments
   may run in their own threads or handle events from the
   windowing system. This makes interactive applications such
   as arcade games execute as fast as corresponding plain Java
   versions. GUI components such as buttons and menu items are
   enabled and disabled when applicable, without additional
   programming. This paper covers an example application in
   Scriptic, an overview of the language constructs, the
   implementation, originality, previous work and current work.