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Wednesday, 18 October 2017

Inheritance in java

Inheritance

"Inheritance is a process by which object of one class acquires the properties of the object of another class".

The Mechanism of deriving a new class from an old one is called inheritance.

Types Of Inheritance

 

1.single Inheritance

2.Multi-level Inheritance

3.Multiple Inheritance

4.Hierarchical  Inheritance

5.Hybrid  Inheritance    

1.single Inheritance:

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2.Multi-level Inheritance:

One class inherit into second class and second class inherits into a third class is known as multi-inheritance.




Types Of Inheritance   1.single Inheritance 2.Multi-level Inheritance 3.Multiple Inheritance 4.Hierarchical  Inheritance 5.Hybrid  Inheritance

 

3.Mult Inheritance:

Multiple inheritances do not support in java.

It is not possible in java

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4.Hierarchical  Inheritance:

More than one class derived from one based class is called hierarchical inheritance.

 
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5.Hybrid  Inheritance:

Hybrid  Inheritance does not support in java
It is also not possible in java.

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-------------------------------------------------------------------------------------------------------

→"extends" is the keyword used to inherit the properties of a class. Following is the syntax of extends keyword.

→ Inheritance in java is a mechanism in which one object acquires all the properties and behavior of parent class.

→ We can inherit class using "extends" keyword.

Syntax


class Super
 {
   .....
   .....
}
class Sub extends Super {
   .....
   .....
}

Why use inheritance in java


  • For Method Overriding so, runtime polymorphism can be achieved.
  • For Code Reusability.

 

 

 

                      


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