removing the space using trim() in java

Question

0.00/5 (No votes)

See more:

Hi friends,

I have a jsp which displays the Add Department Field.Here my problem is if it is empty and click on search then it is displaying the alert message as please enter department name.It should not allow the duplicate values.
And my problem is if i give the Department Name as total space then also it is taking and placing that empty value in DB.But my requirement is when i give the department name as all spaces then also it has to display the message as please enter the department name.The code i am using is as below.

JavaScript

if(sub_dept_name == '' || sub_dept_name.trim() == '')
{
     alert("please enter sub department name");
     document.getElementById('txt_sub_deptname').focus();
     return false;
}

this code i wrote in .js file

can any one help please.

Posted 12-Sep-11 1:08am

komali Guntur

Updated 12-Sep-11 1:40am

Richard MacCutchan

v2

Add a Solution

Comments

rkthiyagarajan 12-Sep-11 10:15am

Whats your Real problem space key or string Length ?

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2011-09-12T01:35:00

Solution 1

~~Use the appropriate method (IsEmpty()) of the String[^] class.~~
Use the length[^] property of string.

Posted 12-Sep-11 1:35am

Richard MacCutchan

Updated 12-Sep-11 1:40am

v2

Comments

komali Guntur 12-Sep-11 7:52am

Hi can you tell me hot to use that length[^] in my code i have the code as follows.

var sub_dept_name = document.getElementById('txt_sub_deptname').value;

if(sub_dept_name == '')
{
alert("please enter sub department name");
document.getElementById('txt_sub_deptname').focus();
return false;
}

i want the same validation for when i enter the space(continuously) also

Richard MacCutchan 12-Sep-11 8:19am

Go to the link I posted for you and read the documentation.

rkthiyagarajan 12-Sep-11 8:17am

I think you try to use one more java script like allowed only string.

Richard MacCutchan 12-Sep-11 8:20am

What?

Niral Soni · Answer 2 · 2011-09-12T03:52:00

try this one...