General Information
    • ISSN: 1793-8201 (Print), 2972-4511 (Online)
    • Abbreviated Title: Int. J. Comput. Theory Eng.
    • Frequency: Quarterly
    • DOI: 10.7763/IJCTE
    • Editor-in-Chief: Prof. Mehmet Sahinoglu
    • Associate Editor-in-Chief: Assoc. Prof. Alberto Arteta, Assoc. Prof. Engin Maşazade
    • Managing Editor: Ms. Mia Hu
    • Abstracting/Indexing: Scopus (Since 2022), INSPEC (IET), CNKI,  Google Scholar, EBSCO, etc.
    • Average Days from Submission to Acceptance: 192 days
    • E-mail:
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Prof. Mehmet Sahinoglu
Computer Science Department, Troy University, USA
I'm happy to take on the position of editor in chief of IJCTE. We encourage authors to submit papers concerning any branch of computer theory and engineering.

IJCTE 2014 Vol.6(2): 91-96 ISSN: 1793-8201
DOI: 10.7763/IJCTE.2014.V6.843

Finding Plagiarisms with Evidence in Java Programming Courses

Ushio Inoue

Abstract—This paper proposes a new method to find plagiarisms with evidence among a set of student programs that are submitted for programming assignments in elementary Java programming courses. In such an assignment, each student program tends to be similar to others because it is small and structurally simple. Existing plagiarism detection methods are not useful and yield many false-positive errors. The proposed method detects plagiarisms with evidence based on the nature of students who are not accustomed to Java programming. The evaluation results using real assignments showed that analyzing white spaces and peculiar patterns in source codes are very powerful to find plagiarisms with reliable evidence.

Index Terms—Plagiarism detection, java programming, n-gram similarity, longest common subsequence.

Ushio Inoue is with the Department of Information and Communication Engineering, the School of Engineering, Tokyo Denki University, Tokyo, 120-8551 Japan (e-mail:


Cite:Ushio Inoue, "Finding Plagiarisms with Evidence in Java Programming Courses," International Journal of Computer Theory and Engineering vol. 6, no. 2, pp. 91-96, 2014.

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