JSetL: a Java library for supporting declarative programming in Java

In this paper we present a Java library—called JSetL—that offers a number of facilities to support declarative programming such as those usually found in logic or functional declarative languages: logical variables, list and set data structures (possibly partially specified), unification and constraint solving over sets, non‐determinism. The paper describes the main features of JSetL and it shows, through a number of simple examples, how these features can be exploited to support a real declarative programming style in Java. Copyright © 2006 John Wiley & Sons, Ltd.