What are inner classes and what is the practical implementation of inner classes?

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Inner classes are nested inside other class. They have access to outer class fields and methods even if the fields of outer class are defined as private.

public class Pcds

{

class pcdsEmp

{

// inner class defines the required structure

String first;

String last;

}

// array of name objects

clsName personArray[] = {new clsName(), new clsName(), new clsName()};

}

Normally inner classes are used for data structures like one shown above or some kind of helper classes.