lots of "extends" ??

[sonir shah]

class A { 
   int i = 10;  
   int m1( ) { return i; } 
} 
class B extends A { 
   int i = 20;  
   int m1() { return i; } 
} 
class C extends B { 
   int i = 30;  
   int m1() { return i; } 
} 
public class TestClass 
{
   public static void main(String args[ ] ) 
   {
      A o1 = new C( );
      B o2 = (B) o1;
      System.out.println(o1.m1( ) );
      System.out.println(o2.i );
   }
}

Options :
1) The program will fail to compile
2) Class cast exception at runtime
3)it will print 30,20
4)it will print 30,30
5)it will print 20,20
The output is 3)30,20
Why??
{I edited the post to add the code tag, ersin eser}
[ January 10, 2002: Message edited by: ersin eser ]

[Rob Ross]

Sonir,
you need to start using the CODE tags before and after your code. Type [ CODE ] without any spaces between the bracket and the word CODE at the begining of your code, then [ /CODE ] at the end of your code, without the spaces. This will make it much much easier to read your code and help you!

[ersin eser]

methods dynamically bind not the instant variables.