Analysis of Code Refactoring Impact on Software Quality

Code refactoring is a "Technique used for restructuring an existing source code, improving its internal structure without changing its external behaviour". It is the process of changing a source code in such a way that it does not alter the external behaviour of the code yet improves its internal structure. It is a way to clean up code that minimizes the chances of introducing bugs. Refactoring is a change made to the internal structure of a software component to make it easier to understand and cheaper to modify, without changing the observable behaviour of that software component. Bad smells indicate that there is something wrong in the code that have to refactor. There are different tools that are available to identify and remove these bad smells. It is a technique that change our source code in a more readable and maintainable form by removing the bad smells from the code. Refactoring is used to improve the quality of software by reducing the complexity. In this paper bad smells are found and perform the refactoring based on these bad smell and then find the complexity of program and compare with initial complexity. This paper shows that when refactoring is performed the complexity of software decrease and easily understandable.