Ravisankar.P.R

  Java Inner Classes In Java, it is also possible to nest classes (a class within a class). The purpose of nested classes is to group classes that belong together, which makes your code more readable and maintainable. To access the inner class, create an object of the outer class, and then create an object of the inner class: Example class OuterClass {   int x = 10;     class InnerClass {     int y = 5;   } }   public class Main {   public static void main(String[] args) {     OuterClass myOuter = new OuterClass();     OuterClass.InnerClass myInner = myOuter.new InnerClass();     System.out.println(myInner.y + myOuter.x);   } }   // Outputs 15 (5 + 10)   Private Inner Class Unlike a "regular" class, an inner class can be  private  or  protected . If you don't want outside objects to access the inner class, declare...