Inheritance
* Inheritance in java is a mechanism in which one object acquires all the properties and behaviors of parent object.*The idea behind inheritance in java is that you can create new classes that are built upon existing classes.
*When you inherit from an existing class, you can reuse methods and fields of parent class, and you can add new methods and fields also.
*Inheritance represents the IS-A relationship, also known as Parent-Child relationship.
*Used for Method Overriding (So Runtime Polymorphism).
*User for Code Reusability.
*The keyword extends indicates that you are making a new class that derives from an existing class.
*In the terminology of Java, a class that is inherited is called a super class. The new class is called a subclass.
public class A {
int a = 10;
int add (){
return a = a+10;
}
}
class B extends A {
public static void main(String args[]){
B b = new B();
b.a = 20;
System.out.println(b.add());
}
}
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