cohesion and coupling in software engineering ppt

Having private fields, non-public classes and private methods provide loose-coupling, while making all members visible within the class and having package as the default visibility provide high cohesion.Ĭomputer Science, is an Assistant Professor and has research interests in the areas of Bioinformatics, Computational Biology, and Biomedical Natural Language Processing.Difference Between Coupling vs Cohesion Software Engineering, as a discipline, is primarily a conglomeration of individualistic processes, aggregated to form a single outlook, more like a Coupling. In other words, loose coupling and strong cohesion provides the best software. In order to have the best quality software, cohesion and coupling should reach the two opposite ends of their spectrums. It is also possible to have some coupling to help objects interact with each other without hampering its scalability and flexibility.Ĭohesion talks about how much the functionality are related to each other within the module, while coupling deals with how much one module is dependent on the other program modules within the whole application. However, in programming languages like Java, completely avoiding coupling is impossible.īut it is recommended that the programmers give their best effort to reduce the coupling as much as possible.

This is a nightmare when the code is modified, because high coupling means that the programmers need to work on several places of code for even a single behavioral modification. Strong coupling is never good because one object can be highly dependent on some other object. Loosely-coupled programs are high in flexibility and extensibility. Interactions between two objects occur because there is coupling. Maintaining, modifying and extending behaviors scattered all over the code is very tedious even for the most experience programmers. Difference Between Coupling And Cohesion In Software Engineering Ppt Code Is Very

Its just that without cohesion, it will be very difficult to mange the functionality because they will be scattered in many wrong places as the complexity of the application increases over time. It is important to understand that not having cohesiveness does not mean that the overall application does not have the required functionality. On the other hand, if a class is performing a bunch of totally unrelated functionalities that means the class is not cohesive at all. If a certain class is performing a set of highly related functions, that class is said to be cohesive. Well structured classes lead to highly cohesive programs. These two software engineering metrics were developed by Larry Constantine to reduce the cost of modifying and maintaining software.

Difference Between Coupling And Cohesion In Software Engineering Ppt Code Is Very.

Cohesion and coupling in software engineering ppt