design patterns - Is this better approach of creating Objects in Java than this? -

approach of creating objects

at present,

i have following structure

abstract class a{  public abstract void b(); public abstract void c(); public abstract void d();  public void e(){  sample statements;  } }   public class z extends a{      public void b() {         // todo auto-generated method stub      }       public void c() {         // todo auto-generated method stub      }       public void d() {         // todo auto-generated method stub      }      public void x() {         sample statements;;         whcih specific class;      }   } 

my question in above class z, dont want impl define method x specific to

in same way define new class p, im other 2 methods not implemented.

is right way implement way of creatin suit requirements create object?

or there better approach go create

i worried in class z, since methods c & d not unforeseen effects during programing later

one more thought have got

shall use factory design pattern implement same objects?

your design might violate liskov substitution principle. consider using interface x(), and/or delegation instead of inheritance.