Adaptive Software Solutions: High cohesion

Friday, September 21, 2007

High cohesion

[Time: 4 mins]

Stuff that goes together, stays together
Easy to discover relevant code
Levels of cohesion

packages
classes
methods

So in very simple words, cohesion is keeping related stuff together so we can find what we want without too much difficulty.


Example 1: 

public class Student {

    //cohesive methods

    public void registerForCourse() {}

    public void deregisterFromCourse() {}

    viewTranscripts() {}

    //methods below are not in synch with the responsibilities of the Student class

    //hence cohesion is broken

    submit grades() {}

    submitCourseSchedule() {}

 

}