Question

Regular Expression to exclude certain special characters

Asked by: royalcyber

Hi,
    Can anyone of you help me with a regular expression which will not allow certain special characters like ~`@#$ . All others (like all alphanumerics and Chinese and any other language characters) should be allowed. This regular expression will be in used in Java.

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Asked On
2008-02-27 at 00:22:02ID23196254
Tags

Java Regular Expression

Topics

Regular Expressions

,

Java Programming Language

Participating Experts
3
Points
500
Comments
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Answers

 

by: cmalakarPosted on 2008-02-27 at 00:27:02ID: 20992268

[^~`@#$]*

 

by: cmalakarPosted on 2008-02-27 at 00:31:43ID: 20992281

Can be used in the following way..

"abcd".matches("[^~`@#$]*")

 

by: royalcyberPosted on 2008-02-27 at 00:40:20ID: 20992314

Thank you cmalakar. But if i use a chinese string like  "°íüÐë ÑÕ©üÞó¹" , it says doesnt match. Attaching code snippet. i get "No Match" as the output ..

public class RegEx {
 
	public static void main(String[] args) {
	
		String testString = "°íüÐë ÑÕ©üÞó¹";
		if(testString.matches("[^~`@\\s#$]*"))
			System.out.println("Matches");
		else
			System.out.println("No match");
	}
}
                                              
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by: royalcyberPosted on 2008-02-27 at 00:40:57ID: 20992316

The string actually used was : °íüÐë ÑÕ©üÞó¹

 

by: royalcyberPosted on 2008-02-27 at 00:43:19ID: 20992325

No idea why the font above changes. But you could try any Chinese or Japanese string (from google Eng->Chinese translation) and try the above regex. It fails.. :( . Could you check the same please..

 

by: cmalakarPosted on 2008-02-27 at 00:48:23ID: 20992346

You have.. \\s

in reg expr..  And in your string contains  space at  6th position...

hence it is not a match..

 

by: ozoPosted on 2008-02-27 at 00:59:03ID: 20992404

the \\s matches the space between ë Ñ
do you want to either remove the \\s or the space?

 

by: royalcyberPosted on 2008-02-27 at 00:59:21ID: 20992407

oooh.. thts rt.. it wrks cool cmalalar. Also i added a \\s to avoid a space in the string. Is it rt ? Also how do i avoid tabs ?

 

by: cmalakarPosted on 2008-02-27 at 01:08:27ID: 20992460

\\s matches tabs also..

 

by: royalcyberPosted on 2008-02-27 at 01:09:52ID: 20992466

ok.. thanks a lot for your support cmalakar ..

 

by: fix2009Posted on 2009-01-26 at 20:30:31ID: 23473711

Could you also provide tip on the above expression. ("[^~`@#$]*"). How to limit the lenght of input string lets say I want it between 8 to 25 characters only.

 

by: ozoPosted on 2009-01-27 at 00:05:32ID: 23474371

^[^~`@#$]{8,25}$

20120131-EE-VQP-002

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