How to reference the class-instance, created in parent class.

Hi, I have following scenario. During compilation I am gettting error message -- "cannot resolve symbol - symbol : Variable myZ"
CODE :
under package A.1;
     ClassZ
     Servlet1
          ClassZ myZ = new ClassZ;
under package A.2;
     Servlet2 extends Servlet1
          myZ.printHi();
How to reference the class-instance created in the parent class?

some corrections ...
under package A.1;
     ClassZ
     Servlet1
          init()
               ClassZ myZ = new ClassZ;
under package A.2;
     Servlet2 extends Servlet1
          myZ.printHi();

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