the explanation of output of simple java program

[amol84]

class Base {
int i=99;
public void amethod(){
System.out.println("Base.amethod()");
}
}

public class RType extends Base{
int i=-1;
public static void main(String argv[]){
Base b = new RType();//<= Note the type
System.out.println(b.i);
b.amethod();
}

public void amethod(){
System.out.println("RType.amethod()");
}
}

I complied the above code and got the following output :
99
RType.amethod()

Can someone explain why I got 99 instead of -1 .
Thanks
Amol

[Supamagier]

[b]Base b[/b] = new RType();//<= Note the type
System.out.println(b.i);

Base b, not RType b.
And b.i = 99.