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Inheritance Advantages and Disadvantages

Advantages:-

One of the key benefits of inheritance is to minimize the amount of duplicate code in an application by sharing common code amongst several subclasses. Where equivalent code exists in two related classes, the hierarchy can usually be refactored to move the common code up to a mutual superclass. This also tends to result in a better organization of code and smaller, simpler compilation units.

Inheritance can also make application code more flexible to change because classes that inherit from a common superclass can be used interchangeably. If the return type of a method is superclass

Reusability -- facility to use public methods of base class without rewriting the same
Extensibility -- extending the base class logic as per business logic of the derived class
Data hiding -- base class can decide to keep some data private so that it cannot be altered by the derived class

Overriding--With inheritance, we will be able to override the methods of the base class so that meaningful implementation of the base class method can be designed in the derived class.

Disadvantages:-

1.One of the main disadvantages of inheritance in Java (the same in other object-oriented languages) is the increased time/effort it takes the program to jump through all the levels of overloaded classes. If a given class has ten levels of abstraction above it, then it will essentially take ten jumps to run through a function defined in each of those classes

2.Main disadvantage of using inheritance is that the two classes (base and inherited class) get tightly coupled.
This means one cannot be used independent of each other.

3. Also with time, during maintenance adding new features both base as well as derived classes are required to be changed. If a method signature is changed then we will be affected in both cases (inheritance & composition)

4. If a method is deleted in the "super class" or aggregate, then we will have to re-factor in case of using that method.Here things can get a bit complicated in case of inheritance because our programs will still compile, but the methods of the subclass will no longer be overriding superclass methods. These methods will become independent methods in their own right.


Inheritance offers the following advantages --
Developement model closer to real life object model with hierarchical relationships
Reusability -- facility to use public methods of base class without rewriting the same
Extensibility -- extending the base class logic as per business logic of the derived class
Data hiding -- base class can decide to keep some data private so that it cannot be altered by the derived class

Cp21,
Can I tell you something? Calm yourself down and listen to me. I was the one who initiated all the fights here so you can say anything to me. But, Radhkrishna genuinely helped you and you are giving him all this in return. I strongly believe that this isn't right and appropriate, and you owe an apology to Radhakrishna.

Radhakrisn: I know you would like to give a genuine advise and easiest thing is to advise. And very few people take it seriously , rest will see it negatively and may take it is as a parental advise. 
I see a lot new thread because of your advise?

magorkhe1, the new threads are because of cp21's ego, immaturity and anger management issues.

Radhakrishna and Pharsi, it's not worth arguing with chandra prakash. So, ignore him and have a nice weekend.

@ magorke1:

It is fine buddy... I can understand what you are saying. Most probably you did not get from where it begin. It is not today's story alone.
This little bastard cp21, who is a nepali, says that he does not know nepali... and starts abusing genuine person who helps him with his stupid lazy ass questions which he can easily find googling it. And when somebody says him something, he starts abusing that person. And he has been doing that for a long time.
He thinks that he is studying in IT field, most probably would always call him as an ENGINEER, but in reality is sucking cheap ass dhoti's dick in a consultancy and shows the manner of a cheap ass third class individual by abusing and disrespecting all.
Enough is enough for this bastard child.
Whatever advice it is, we are not telling him how to live his damn retarded fucking life. We are just asking him to pay some respect and have some manners.
But it is just an another day to him, I know that. Few days back, he was fighting with somebody else, today he started bullshitting with me and tomorrow, you may the person, who know.
Thanks for your advice though. Will keep in mind.

cp21 should have some respect to people who genuinely help others in sajha, like Mr. RadhaKrisha. No body is paying anyone for help or their valuable time giving suggestions. It's for free and comes only because we Nepalis have lots of empathy and at one time we all have been through the same situations. cp21 should have respect for RadhaKrishna ji. He has genuinely helped lots of people in sajha and always give honest answers. If he's telling you to study you should take it as a suggestion from a big brother and maybe in your best interest to do so.

CP भाई , गूगल मा एउटा click गरेर पाइने उत्तर लाइ तिमि ले येहा पोस्ट गरेउ तै पनि अरु ले उत्तर दिए | धन्यबाद दिन त कता हो कता हो उल्टो गालि गर्न मा उत्र्रेउ ! लाज लाग्दैन भाई ?
*भाई किन भनेको भन्लाउ , तिम्रो बोलि चाली कुरो गरे को ताल हेरेर दाइ त के मित्र नि भन्न मन लागेन !

Hey Chandra Prakash - Fuck You.