The paper presents an experimental toolkit for modeling and solving fuzzy constraint satisfaction problems (FCSPs) called JFSolver. JFSolver is a Java based library developed as an extension of a crisp constraint programming library to provide an enhanced functionality for handling fuzzy constraints including fuzzy constraint specification, propagation and search mechanisms. JFSolver comprises an application programming interface for fuzzy constraint programming and a graphical editor for interactive problem definition and solving. This functionality is demonstrated with an illustrative example.
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