boxing ,widening,var-args

[vini singh]

class Eggs
  {
    int doX(Long x,Long y){return 1;}
    int doX(long... x){return 2;}
    int doX(Integer x,Integer y){return 3;}
    int doX(Number n,Number m){return 4;}
    public static void main(String s[])
    {
     new Eggs().go();
    }
     void go(){
      short s=7;
      System.out.println(doX(s,s));
      System.out.println(doX(7,7));
      }
 

output: DoX(s,s)=4 doX(7,7)=3

according to me doX(s,s) must be 3 i.e widen and then boxing then why its 4 i.e boxing and then widening.
[edit]Add code tags and disable smilies. CR[/edit]
[ December 06, 2008: Message edited by: Campbell Ritchie ]

[Campbell Ritchie]

There isn't anything to widen to; the only thing that a short can be boxed to is Number (Short is a subclass of Number).

And please use the code tags; I have added them and you can see how much easier it is to read.

[Rob Spoor]

A short can never be converted into an Integer, so all that remains is Short, Number or Object.

You can't widen then box, only box then widen