Question

Java Inner class

class Outer

{

   private int x=10;

   private static int y=20 ;

   publics void M1( )

{  

       int z=30;

       class Inner   

       {

            public void M2()

             {                                                          

                   Sytem.out.println(“sum: ”+ (x+y+z));

              }

        }

Inner i=new Inner();

   i.M2() ; /// first call

   i.M2(); // second call

i.M2(); // third call

}   // end of M1       

publics static void main(String[] args)

      {

          Outer O = new Outer() ;

          O.M1();    ///   control starts from here

      }

}   // end of outer class

1. Can method M2 access the variable z?

2. Explain your reason

Answer 1

Please find the answer below.
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Outer.java

package c4;

public class Outer

{

   private int x=10;

   private static int y=20 ;
   int z=30;
   public void M1( )

   {

       int z=30;

       class Inner   

       {

           public void M2()

           {

               System.out.println("sum: "+ (x+y+z));

           }

       }

       Inner i=new Inner();

       i.M2() ; /// first call

       i.M2(); // second call

       i.M2(); // third call

   } // end of M1   

   public static void main(String[] args)

   {

       Outer O = new Outer() ;

       O.M1(); /// control starts from here

   }
  
} // end of outer class

1. Can method M2 access the variable z? Yes it can access z

2. Explain your reason

Method M2 is inside the Inner class. And Inner class has access to all it's parent class or folder.

Output is as below:

Quick A Problems @ Javadoc Declaration Search Console X <terminated > Outer [Java Application] C:\Program Files\Java\jdk1.8.0 sum: 60 sum: 60 sum: 60