INNER CLASS:
============
==> A CLASS WITHIN ANOTHER CLASS IS CALLED AS "INNER CLASS"
Ex: 
	MobilePhone{			SimCard{
	}				}

==> inner class is dependent class of outer class.
Syntax:
	class OuterClass{
		class IneerClass{
		}
	}

==> The Data members of outer class can extend to inner class.
Whereas the data members of inner class cannot extend to outer class.
==> The outer class always be allowed to define with either public type or default type only.
Whereas the inner class can allow define with any access modifier (default/public/private/protected).

How to create the object for the inner class:
=============================================
==> two ways:
	1) within method of outer class

package AIT.IO.Java;

class OuterClass{
	int x;
	private int y;
	public class InnerClass{
		int p;
		private int q;
		
		public void m11() {
			System.out.println("x = "+x);
			System.out.println("y = "+y);
		}
		
	}
	OuterClass(int x,int y)
	{
		this.x = x;
		this.y = y;
	}
	
	public void m1()
	{
		InnerClass ic = new InnerClass();
		
		ic.p = 100;
		ic.q = 200;
		
		System.out.println("p = "+ic.p);
		System.out.println("q = "+ic.q);
		
		ic.m11();
	}
	
	
}

public class MainClass {

	public static void main(String[] args) {
		OuterClass oc = new OuterClass(1000,2000);
		oc.m1();
	}

}

	2) In outside of the outer class
	==================================
	Syntax:
		outer-class-name.inner-class-name Identifier_inner_class_object = outer-class-object.new inner-class-name();

ex:
	OuterClass o = new OuterClass();
	OuterClass.InnerClass obj = o.new InnerClass();

package AIT.IO.Java;

class OuterClass{
	int x;
	private int y;
	public class InnerClass{
		int p;
		private int q;
		
		public void m11() {
			System.out.println("x = "+x);
			System.out.println("y = "+y);
		}
		
	}
	OuterClass(int x,int y)
	{
		this.x = x;
		this.y = y;
	}
}

public class MainClass {

	public static void main(String[] args) {
		OuterClass oc = new OuterClass(1000,2000);
		
		// creating the object for the inner class
		OuterClass.InnerClass oi = oc.new InnerClass();
		
		oi.m11();
	}

}

========================================
==> Inner class can be defined with "static".
==> the Non-static data member of outer class can't access in the inner class if the inner class is static type.
==> To create the object of static inner class in outside the outer class:
	Syntax:
		outer-class.inner-class object-reference = new Outer-class-name.Inner-class();

package AIT.IO.Java;

class Outer{
	private int x;
	private static int y;
	static class Inner{
		private int x = 20;
		private static int p;
		
		Inner(int p)
		{
			this.p = p;
		}
		public void m11()
		{
			System.out.println("Static Varaiable = "+Outer.y);
		}
	}
	
	Outer(int x,int y)
	{
		this.x = x;
		this.y = y;
	}
	
//	public void m1()
//	{
//		Inner iobj = new Inner(1122);
//		iobj.m11();
//	}
}

public class Main {

	public static void main(String[] args) {
		Outer oobj = new Outer(112,121);
		
		//object for the inner class
		Outer.Inner aobj = new Outer.Inner(123);
		aobj.m11();
		
//		oobj.m1();
	}

}