Java Beans dot Asia

Consider the following case of inheritance:

public class  Parent {
   public Parent()  {
	getValue();
   }
   public void getValue()  {

   }
}

public class  Child extends Parent {
   private final Integer integer;
   public Child()  {
	integer = new Integer(888);
   }

   @Override
   public void getValue()  {
	System.out.println(integer);
   }
}

Question: What would the following program print, why?

public class  Test {
   public static void main(String[] args)  {
	Child child = new Child();
	child.getValue();
   }
}

Lets assume that getValue() implementation in Child class was changed to:

@Override
public void getValue()  {
     System.out.println(integer.toString());
}

Question: What would the output of the Test class be now, why?

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Tags: brainteaser, design patterns, inheritance, java, overridable methods

Categories: brainteaser, design patterns, java