Since the parameter is a string so to check it against a blank value, the code should be:-
if(param.equals(""))
and not if(param=="") as this code will check the param object and not its value.
Charu
>From: "Amrinder, Arora (Meritage)" <[EMAIL PROTECTED]>
>Reply-To: "A mailing list for discussion about Sun Microsystem's Java Servlet API Technology." <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: checking value of parameter from jsp
>Date: Wed, 28 Nov 2001 15:16:42 -0500
>
>Kwan,
>
>Your string could be all blanks.
>
>try testing like:
>
>String name = request.getParameter ("name");
>if ((name == null) || (name.trim()==""))
>
>--amrinder
>
>_____________________________________________
>From: Kwan, William [mailto:[EMAIL PROTECTED]]
>Sent: Wednesday, November 28, 2001 2:54 PM
>To: [EMAIL PROTECTED]
>Subject: checking value of parameter from jsp
>
>
>Hi all,
>
>I'm passing information from a html page to a servlet.
>
>Here is some code:
>
>String param = request.getParameter("name");
>if (param == null) sqlstr = "Select * from name";
>else sqlstr ="Select * from name where fname like '"+param + "'";
>
>and
>
>if (param == "") sqlstr = "Select * from name";
>else sqlstr ="Select * from name where fname like '"+param + "'";
>
>These both dont detect the blank value when they click submit on the jsp
>page. It always goes to the else part.
>
>Am I doing something wrong?? Is there another way to detect if they entered
>any data in the field on the form??
>
>thanks,
>Will
>
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