Concept on Coupling and Cohesion

[dimple bav]

Hi everyone,

I have a doubt on topic of " Coupling and Cohesion".

I have gone through the topic in K&B but thats seem to be theory.

In the net i didnt found much examples on this.

Can anyone explain with an example ? If possible.

Thank you.

[Wouter Oet]

You're not the first with that kind of question. Therefor there are a lot of topics about it.

[Manish Awasthy]

well that is true in K & B all is theory & Thanks to wouter for the link

[Neha Daga]

see if this helps you.

[dimple bav]

Ok dear .

What about coupling?

See if can you can find any example.

Thanks.

[Neha Daga]

Did you read this in that article?

Coupling means that one class gets at the implementation of another class.
For example:

   
Driver campbell = new Driver();
Car ford = new Car("Ford", "red");
. . .
public class Driver
{
Car myCar;
. . .
public void goFaster(int speed)
{
myCar.speed += speed;
}
. . .
}

 

The Car class has allowed access to its speed field and the Driver class changes its value directly. This means other classes gain access to the implementation of the Car class; any changes to that implementation will "break" the Driver class. This is "tight coupling"

[dimple bav]

Hey

I can say INHERITANCE is something like related Coupling in which both the classes i.e Subclass and Superclass know about each other.

Correct ?

[dimple bav]

Hey Neha,

I had mistyped

I mean to say what about Cohesion example .

For example : CLass Bank_Accounts have information of other classes like

class Saving_acc
class fixed_deposit
class stat_report

all the above classes have the methods described in class Bank_accounts

Am i correct ?

Or some other example.

[Neha Daga]

dimple bav wrote:Hey

I can say INHERITANCE is something like related Coupling in which both the classes i.e Subclass and Superclass know about each other.

Correct ?

yes I think so. But super class doesn't know anything about subclass implementation, its only subclass that know everything about public and protected members of superclass.

[Neha Daga]

can you elaborate you example?