Research on the Tools of Clone Code Refactoring

Clone code is the code fragment that is identical or similar in syntax or semantics, which has great impact on software development and maintenance. According to the large amount of clone code in software and its complex changes, researchers have proposed many methods to eliminate the harmful clone code, in which refactoring is an effective measure. In this paper, concepts of clone code and refactoring are introduced firstly. And then the main methods of current clone code refactoring are compared and analyzed, so the related tools of clone code refactoring can be elaborated and their advantages and disadvantages are summarized. At last, the shortcomings and limitations of the clone code refactoring are discussed.