Solved

error while using ternary operator in jsp

Posted on 2004-09-09
7
991 Views
Last Modified: 2008-02-01
whats wrong with this


<input type="text" searchField="true" class='text' maxlength="2"  size="2"  value='<%=out.println(request.getParameter("countryId") != null ? request.getParameter("countryId") : "" )%>'         name="countryId"

i am getting this error

Incompatible type for method. Can't convert void to java.lang.Object. out.print(out.println(request.getParameter("countryId") != null ? request.getParameter("countryId") : "" ))

0
Comment
Question by:chaitu chaitu
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 20

Author Comment

by:chaitu chaitu
ID: 12015890
i solved the problem like this

<input type="text" searchField="true" class='text' maxlength="10"  size="10"  value='<%out.println(request.getParameter("countryName") != null ? request.getParameter("countryName") : "" );%>'   name="countryName" >
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 12017903
FYI

<%=expression%>
expression is a combination of variable and operation that final return only one value.

You use this
out.println(request.getParameter("countryId") != null ? request.getParameter("countryId") : "" )
It's not expression since it return void. jsp expression cannot accept method that return void.

If you really want to use expression instead of scriptlet, I think it should be
<%=request.getParameter("countryId") != null ? request.getParameter("countryId") : ""%>
0
 
LVL 32

Expert Comment

by:ldbkutty
ID: 12018005
ok...for your reference,

whatever you give inside the <%= and %> is considered to be a out.print
i.e. <%=yourContent%> itsellf refers to out.print(yourContent);

So, this is the way normally developers use:

<input type="text" searchField="true" class='text' maxlength="10"  size="10"  value='<%=request.getParameter("countryName") != null ? request.getParameter("countryName") : ""%>'  name="countryName">
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 32

Expert Comment

by:ldbkutty
ID: 12018038
haaa....didnt noticed your comment sampol..
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 12023339
For more clarification about jsp,

when you create jsp file and deploy to server. the server will translate jsp to servlet line by line.

<%="abc"%>

will be convert to

out.println("abc");
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 12531593
PAQed, with points refunded (50)

modulo
Community Support Moderator
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article outlines some of the reasons why an email message gets flagged as spam on a recipient's end.
Resolving an irritating Remote Desktop connection that stops your saved credentials from being used.
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have. In this…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question