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() {} }

Java2html

Resources:

• High cohesion on Wikipedia

Note: This text was originally posted on my earlier blog at http://www.adaptivelearningonline.net