This thesis gives a working example on how to design and implement a plagiarism detection software in Java using various libraries. The software uses websites as datasources to determine if a text or a file is a plagiarized document or not.

The first chapter of the report is describing how the software works, which tools were used with of a focus on the different Java libraries. This part deals also with the technical requirements.

The main part is describing how the program has been designed (class diagrams, design decisions, etc.). An analysis of the implementation is also developed in this part, beginning with the Levenshtein algorithm description.

The final part is showing the user interface, especially the different windows of the software, and deals also with the possible improvements.