Unveiling the Power of Inner Classes in Java: A Comprehensive Exploration

source : tutorialspoint

Introduction:
Java, renowned for its versatility and object-oriented paradigm, introduces a compelling feature — inner classes. In this comprehensive exploration, we will delve even deeper into the intricacies of inner classes, elucidating each component while furnishing a myriad of code examples to foster a profound understanding.

What are Inner Classes?
Inner classes, by definition, are classes defined within the scope of another class. These classes possess the unique capability of accessing members of the outer class, contributing to improved encapsulation and code organization.

Inner Class Hierarchy:
Understanding the hierarchy of inner classes is crucial. Inner classes are broadly categorized into three types: Member Inner Class, Local Inner Class, and Anonymous Inner Class.

Member Inner Class:

Defined at the member level of a class.
Has direct access to the members of the outer class, including private members.

public class Outer {
    private int outerVar = 10;

    class Inner {
        void display() {
            System.out.println("Outer Variable: " + outerVar);
        }
    }
}