ABTRACT CLASS ************* • It can not be instantiated • It all

What is the difference between and interface and an
abstract class ?

Question Posted / porchelvi

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Answer Posted / porchelvi

ABTRACT CLASS
*************
• It can not be instantiated

• It allow us to specify all access modifier except
Private

• A class inheriting this must implement all of its
abstract method

• A class can inherit only one abstract class at a
time.

• Abstract class can add more functionality with out
destroying child classes that were using old version.

• We can declare the following
1. Fields
2. Constructors
3. Static Constructors
4. Static Functions
5. Concrete Functions

INTERFACE
*********
• It can not be instantiated

• It allows only public Access modifier

• A class implementing interface must provide body
for its entire member.

• A class can implement more than one interface at a
time.

• Adding of additional functionality will have an
effect on its child class due to the necessary
implementation of interface methods.

• We can not declare the following
1. Fields
2. Constructors
3. Static Constructors
4. Static Functions
5. Concrete Functions

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