Trimming white spaces

Question

Is there any inbuilt method for trimming only trailing white spaces from a string? that is similar to rtrim available in other languages

Example: String str1 = "stackoverflow "; String str2 = " stackoverflow ";

should become,

str1 = "stackoverflow"; str2 = " stackoverflow";

Did you even searched for it on google? – Rohit Jain Nov 08 '12 at 23:08 — Rohit Jain, Nov 08 '12 at 23:08
You mean trailing white-space? – Mike Park Nov 08 '12 at 23:09 — Mike Park, Nov 08 '12 at 23:09
@FirmView - Thanks for abusing the site... – jahroy Nov 08 '12 at 23:09 — jahroy, Nov 08 '12 at 23:09

kosa · Answer 1 · 2012-11-08T23:19:20.653

3

String has method called trim();

str1.trim(); will do the job for you.

Update:

If you don't want to trim() leading spaces, you may need to write your own implementation as DNA suggested.

edited Nov 08 '12 at 23:19

answered Nov 08 '12 at 23:07

kosa

1

@FirmView.. Your understanding of trailing and leading is reverse. – Rohit Jain Nov 08 '12 at 23:10
2

@FirmView: Erm, what? Look at your example. – Jon Skeet Nov 08 '12 at 23:10
1

@FirmView: Please spend sometime to understand what you want achieve. – kosa Nov 08 '12 at 23:12

score 3 · Answer 2 · answered Nov 08 '12 at 23:13

3

How about checking the source code for String.trim() and modifying it?

Disabling the whitespace removal at the start or the end is a matter of commenting out one line...

answered Nov 08 '12 at 23:13

DNA

score 1 · Answer 3 · answered Nov 08 '12 at 23:16

1

You can either use a regex or iterate over the string to remove whitespace characters.

Either way, you should read the documentation here: Java String

answered Nov 08 '12 at 23:16

jahroy

score 0 · Answer 4 · answered Nov 08 '12 at 23:12

Plenty of ways to do this, regex being one of them:

To remove trailing whitespaces:

s/\s+$//

Somewhat related, but probably not what you're looking for, to remove leading whitespaces:

s/^\s+//

PS: I believe you mean to say trailing whitespaces, as leading whitespaces imply that the whitespaces come first.

4 Answers4