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Doubt in the code

 
Greenhorn
Posts: 5
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class Super
{ int index = 5;
public void printVal()
{ System.out.println( "Super" );
}
}
class Sub extends Super
{ int index = 2;
public void printVal()
{ System.out.println( "Sub" );
}
}
public class Runner
{ public static void main( String argv[] )
{ Super sup = new Sub();
System.out.print( sup.index + "," );
sup.printVal();
}
}


When I run the above code I expected the output to be 2,Sub because sup is a object of Sub class at runtime.But the output is 5,Sub.Even though index is not a static variable,Super class index is printed.Can someone explain the reason behind this?
 
Ranch Hand
Posts: 809
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All the class variables (static and non-static) both are resolved at compilation time. Since the tpe of sup is Super, so Super's index gets printed.

Remember ALWAYS variables are resolved early. No matter static or non-static.

Naseem
 
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Yes. The notion of overriding (which is achieved through late binding) is for instance METHODS, not for variables or static methods.

VARIABLES don't behave like instance METHODS.

If you want to "override" a variable, you can make it a METHOD.

 
Don't get me started about those stupid light bulbs.
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