#62 Inner Class in Java

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In this lecture we will learn:
– What is an inner class in Java?
– Static inner classes in Java
– Advantages Of inner class

#1
Inner Class:-
– We can also create a class inside another class.
class A
{
class B
{
}
}
– You can call the method of class B by using the dot operator in between both classes A and B.
A.B obj= new B();
– A dollar sign will be introduced in a class name that has an inner class indicating two different classes.
A$B. class
– You also need to create an object of the outer class, to call the methods of an inner class.

#2
Static Inner Class:-
– An inner class can also be declared as static.
– When an inner class is declared as static, then you do not need to create an object for it.
– But an outer class can not be made static.

#3
Advantage of inner class:-
– Nested classes represent a particular type of relationship that is it can access all the members of the outer class, including private.
– Nested classes make the code more readable and maintainable.
– It makes the code more optimize.

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