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overloaded function resolution

 
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class cls{
public void f1(Object o){
System.out.println("Object");
}
public void f1(String o){
System.out.println("String");
}
}
public class Main {
public static void main(String[] args){
new cls().f1(null);
}
}

Why is the output fo the above program "String"? An "Object" type is as good or as bad as a "String" type for "null".
 
author and iconoclast
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The "most specific" overload is chosen. Because String is a subclass of Object, the String version is considered a more specific match.
 
Prasanta Chinara
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Thank you.
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