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:

Only one base class and only one derived class in a program are known as single inheritance.

 

2.Multi-level Inheritance:

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

 

3.Mult Inheritance:

Multiple inheritances do not support in java.

It is not possible in java

 

4.Hierarchical  Inheritance:

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

 

5.Hybrid  Inheritance:

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

 

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

→"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.