public class D
{
    public static void main(String [] args)
    {
         // Can we instantiate an instance of class 'D' here?
         X x1 = new X();

         // Assuming the answer to the previous question is 'yes'
         // how/can we access the attributes 'a' & 'b'
         // (we can access 'a' via the instance 'x1' but it's
         // confusing so some regard it as bad form
         X.a = 100;
         x1.b = 200;
         System.out.println(X.a + " " + x1.b);       

         // Assuming the answer to the first question is 'yes'
         // how can we call m1() & m2()
         X.m1();
         // Again we could call static m1 via a reference but
         // again some regard it as bad form            


         // Compile error: calling non-static without reference
         // No: X.m2();
         x1.m2();
         
    }
}