Regex problem

Did not work when i keyed in this >>> basd112!

using the regex >> ^[A-La-l][a-zA-Z1-9].+

I think it is not blocking special characters ...

The regex i gave you matches

basd112!

(per your spec). Did it say it matches?

>> b1sdfg&q >> this has special character

It may have a special character, but it still matches your spec (a and b)

>>(b) Followed by that it should only have a-z or 1-9 (case for does not matter)

Maybe you mean

(b) Followed by that it should only have ONE OR MORER OF a-z or 1-9 (case for does not matter)

, in which case:


"^[A-La-l][a-zA-Z1-9]+"

Of course that should have been

Maybe you mean

(b) Followed by that it should only have ONE OR MORE OF a-z or 1-9 (case for does not matter)

try:

[A-La-l][:alnum:]+

>>
 try:

[A-La-l][:alnum:]+
>>

In what way is that substantially different?

>>In what way is that substantially different?

Correction - it is substantially different, inasmuch as it's not what was specified

>> still it takes special characters ---
try this --> alasdf!

>>(b) Followed by that it should only have a-z or 1-9 (case for does not matter)
This means it should have nothing else. Which specifically means all the other taps on the keyboard like !@#$%$

Thanx for all the help.

RK

I had tried this ^[A-La-l][a-zA-Z1-9]+

>> still it takes special character
No, it doesn't:
"^[A-La-l][a-zA-Z1-9]+"  does NOT match "alasdf!" so that's OK.

boolean match = "alasdf!".matches("^[A-La-l][a-zA-Z1-9]+");
System.out.println(match);

Output:
false

actually are u testing against jdk or jakarata-oro.jar.

cause struts uses oro.jar.

let me know if I am incorrect.

EK

While

   boolean match = "alasdf".matches("^[A-La-l][a-zA-Z1-9]+");   // <<< removed the '!'

nicely prints:
true

So, don't know how you decided that
>> still it takes special characters

>> actually are u testing against jdk or jakarata-oro.jar.
jdk. Oh, I see.

>> I am using the jakarta regex
Which one: AWK-like regular expression or Perl5 regular expression?

Can you post the code you use?

Perl5 and it is in a struts file.

I will post you the snippet ...

<field property="userId" depends="required,mask">                        
                        <arg0 name="required" key="Login Id " resource="false" />
                        <msg name="mask" key="logon.userid.maskmsg" resource="true"/>
                        <var>
                              <var-name>mask</var-name>
                              <var-value>^[A-La-l][a-zA-Z1-9]+</var-value>
                        </var>
                  </field>

Well, if at http://jakarta.apache.org/oro/demo.html
I enter as Perl5 expression: ^[A-La-l][a-zA-Z1-9]+
and as SearchInput : alasdf!
I get: The input IS NOT an EXACT match

while I get "The input IS an EXACT match." for: alasdf

> I had tried this ^[A-La-l][a-zA-Z1-9]+

try this:

^[A-La-l][a-zA-Z1-9]+$

this expression should be fine

"[A-La-l][a-zA-Z1-9]+"

output is

b1sdfghj - true
m1bshdk - false
b1sdfg&q - false
basd112! - false

>> this expression should be fine
That's indeed what http://jakarta.apache.org/oro/demo.html seems to indicate

Make sure you're allowing for preceding and following whitespace

Not sure what happened here ...

The Asker accepted an answer.

Thanks for accepting, rahulkothari


>> Not sure what happened here ...
What do you mean/try to say, CEHJ?