Difference between Concrete class and Abstract class

Let's have a look at the Concrete class and Abstract class.

Concrete class:-

1. A concrete class is nothing but normal class, we can use as a base class or may not.


2. Not compulsory, it can't contain abstract methods.


3. We can instantiate the object and work with this class.

Eg :

class Sample
{
public void MyMethod()
{..............}
}

Abstract class:-

1. An abstract class is a class which declared with a keyword Abstract.


2. Must be used as a base class.


3. Only intention to declare an abstract class is to use as a base class that is we can't create an object of this class like concrete class.


4. It can contain abstract methods as well as concrete (normal) methods.

Eg :

public abstract class MyClass
{
public void MyMethod()
{..............}

public abstract TestMethod()
{
.........
}
}

 

Author : Valli Perumal