Access Modifiers/Control

Java provides four types of Access Modifiers.  They are public, protected, default and private.

Access Location	public	protected	friendly or default	private
Same class	Y	Y	Y	Y
Sub class in same package	Y	Y	Y	N
Other classes in same package	Y	Y	Y	Y
Sub classes in other packages	Y	Y	N	N
Non-sub classes in other packages	Y	N	N	N

For good programming technique place member data as private and member functions as public.

Example:

class modi

{

            private int k=6;

            void display()

            {

            System.out.println("k in display="+k);

            }

}

class ex

{

            public static void main(String[] args)

            {

            modi obj=new modi();

            obj.display();

            //System.out.println("k in main="+obj.k);

            //this statement provides error since private variable

            //can not be possible to access by other class

            }

}