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Using regular expressions [message #250399]

Thu, 28 February 2008 16:23

Eclipse User

Hi,
I have a constructor which takes a string as an argument. I want to
replace the string with a regular expression.How do I do this in java. I
have read about the package java.util.regex . But was unable to figure out
how this task could be done.
Thanks
Junaid

Re: Using regular expressions [message #250406 is a reply to message #250399]

Thu, 28 February 2008 16:51

Eclipse User

Originally posted by: merks.ca.ibm.com

Junaid,

This is just a basic beginner's Java question, not a question about
Eclipse. It's probably best to Google for this stuff and find some nice
tutorials about them. There are plenty.

Junaid wrote:
> Hi,
> I have a constructor which takes a string as an argument. I want to
> replace the string with a regular expression.How do I do this in java.
> I have read about the package java.util.regex . But was unable to
> figure out how this task could be done.
> Thanks Junaid
>

Re: Using regular expressions [message #250537 is a reply to message #250406]

Fri, 29 February 2008 13:38

Eclipse User

Hi Ed,
Actually I was developing an editor which is used to create files.
The SingleLineRule constructor takes an arguments as String
startsequence,String endsequence,Token.
I want to replace the startsequence with a regular expression.
Example on the editor wud be
abc = 10
I want to validate whether user entered only alphabets before the equals
sign.
I could use the single line rule as SingleLineRule("[a-z][A-Z]*","=",Token)
but I need to compile the regular expression before using it.
How do I do this?
Is there any other method using which I could complete my task.
Thanks
Junaid

Re: Using regular expressions [message #250553 is a reply to message #250537]

Fri, 29 February 2008 14:32

Eclipse User

Originally posted by: merks.ca.ibm.com

Junaid,

You mean java.util.Pattern.compile(String)?

Junaid wrote:
> Hi Ed,
> Actually I was developing an editor which is used to create files.
> The SingleLineRule constructor takes an arguments as String
> startsequence,String endsequence,Token.
> I want to replace the startsequence with a regular expression.
> Example on the editor wud be abc = 10 I want to validate whether user
> entered only alphabets before the equals sign.
> I could use the single line rule as
> SingleLineRule("[a-z][A-Z]*","=",Token)
> but I need to compile the regular expression before using it.
> How do I do this?
> Is there any other method using which I could complete my task.
> Thanks
> Junaid
>

Re: Using regular expressions [message #250611 is a reply to message #250553]

Fri, 29 February 2008 17:31

Eclipse User

Yes using Pattern class to complie the regular expression.

Re: Using regular expressions [message #250615 is a reply to message #250553]

Fri, 29 February 2008 17:34

Eclipse User

What ever is typed on the editor should be validated against a regular
expression.

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