Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 273
  • Last Modified:

JSP Empty String Problem

hi,

I have two edits on my first jsp page, which values I send via form submit to the second page.

I want to test on my second page whether these values is empty, and if they are, forward to another page.

The problem is that when the values are empty, the jsp engine regards them as "not empty"?? and doesnt go into the fowarding
if statement.

I have even tested the values by displaying them in the second page, but no luck.

If I go and set these values to "" before i execute the if, it works!

I must be missing something obvious.

--page 1--

<input type="text" name="edtItemNumber">
 <input type="text" name="edtStoreLocation">


--page 2--

String item = request.getParameter("edtItemNumber");
String location = request.getParameter("edtStoreLocation");

if ((item == "") || (location == ""))
{application.getRequestDispatcher("/oraerror.jsp?ErrorStr=Please complete Item number and Store Location." ).forward(request,response);}


Please help.
0
barnarp
Asked:
barnarp
  • 2
1 Solution
 
objectsCommented:
You shouldn't use == to test String equality. It tests for object equality, not whether the two objects represent the same string. To test if a string is empty use one of the following:

item.equals("")

or

item.length()==0

0
 
barnarpAuthor Commented:
Thanks alot.

Do you know of any reference on the net, where I can learn more about string functions etc ?

Pierre
0
 
objectsCommented:
Pierre,

Try:
http://java.sun.com/docs/books/tutorial/java/data/strings.html

And of course the good old javadoc :-)

http://www.objects.com.au
Brainbench MVP for Java 1
http://www.brainbench.com
0

Featured Post

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!

  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now