This paper describes the design and development of a Java Distributed Computation Library, which provides a simple development platform for developers who wish to quickly implement a distributed computation in the context of an SPMD architecture (Single Program, Multiple Data). The need for this research arose out of the realisation that the currently available distributed computation libraries and systems do not adequately meet certain criteria, such as ease of development, dynamic changes to system behaviour, and easy deployment of distributed software. The proposed solution to this problem was to produce a Java-based distributed computation library which enables developers to use the Java language to quickly and easily implement a distributed computation. The results of experiments conducted using DCL are also presented, as a means of showing that DCL met its design goals.