int parameter validation, ( options??)

[Zkr Ryz]

Hi all.
I would like to hear your opinions on the next topic.
When I recive a parameter in jsp that is an int, which do you think is the correct way to validate the parameter was sended, or the parameter is an int , etc.
currently I use:

   String intString = request.getParameter("parameter");
   int intValue=0;
   if( intString != null ){
      intValue = Integer.ParseInt( intString );
   }
   if( intValue > 0 ){
     code . . . .
   }else{
     code . . . .
   }

Other is

int intValue = 0 ;
   try{
     intValue = Integer.parseInt( request.getparameter("parameter");
   }catch( NumberFormatException nfe ){
     // ignored
   }
   if( intValue > 0 ){
   }

But I dont really think that try / catch should be used.
which other approach do you know.
Thanks in advance for the answers...
)

[This message has been edited by Zkr Ryz (edited June 27, 2001).]