java regular expressions problem

[rameshch45]

I am reading a string from the TextArea content in a JSP page, and then building a pattern object then call compile method, it is not working beyond the first line though I passed Pattern.MULTILINE as the second parameter to the compile method. Thanks.

[JosAH]

Also add the flag Pattern.UNIX_LINES to the compile method.

kind regards,

Jos

[BigDaddyLH]

If you are still having problems, post a SSCCE: http://physci.org/codes/sscce.html

Note this problem has nothing to do with jsp or text areas! Your sample program will only be a few lines long.

[rameshch45]

Thanks for letting me know what way I have to present the question.

The code is as below:

import java.util.regex.*;
 
public class Main {
 
    /** Creates a new instance of Main */
    public Main() {
    }
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
                String inputString = "[e-mail]\[e-mail]\[e-mail]";
        String matchedPattern ="";
        String regularExp = "^[a-zA-Z][\\w+.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z][.,]?$";
 
 
        Pattern p = Pattern.compile(regularExp);
        Matcher m = null;
        boolean matchFound;
 
        m = p.matcher(inputString);
        matchFound = m.matches();
        if (matchFound) 
        {
        matchedPattern += m.group()+"\n";
        }
        System.out.print(matchedPattern);
    }
 
}
 

When I enter the below lines in a TextArea, the request parameter gets submitted into a string as "[e-mail]\[e-mail]\nrunky.ss@yahoo.c om".

If I tokenize it using StringTokenizer and match it with the regular expression, all three ids are matched but three of them dont match when they are in a new line. I used the flags MULTILINE and UNIXLINES etc as the second parameter to the compile method but with no result.

[BigDaddyLH]

Please enclose your posted code in [code] tags (See How to Ask a Question).

This makes it easier for our Experts to read and understand it. Failing to do so creates extra work for the moderators, thus wasting resources, otherwise available to answer the members' questions.

Please use [code] tags in future.

MODERATOR

[BigDaddyLH]

Your code works for me:

import java.util.regex.*;
 
public class Main {
    public static void main(String[] args) {
        String regularExp = "^[a-zA-Z][\\w+.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z][.,]?$";
        String inputString = "[e-mail]\[e-mail]\[e-mail]";
 
        int flags = Pattern.UNIX_LINES | Pattern.MULTILINE;
        Pattern pattern = Pattern.compile(regularExp, flags);
        Matcher m = pattern.matcher(inputString);
 
        boolean found = false;
        while (m.find()) {
            System.out.format("group[%d, %d]=\"%s\"%n", m.start(), m.end(), m.group());
            found = true;
        }
        if(!found){
            System.out.println("No match found.");
        }
    }
}

[rameshch45]

Yes, but it does not work if I give more data as below:

import java.util.regex.*;
 
public class Main {
    public static void main(String[] args) {
        String regularExp = "^[a-zA-Z][\\w+.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z][.,]?$";
        String inputString = "[e-mail]\[e-mail]\[e-mail] my id is [e-mail]    do you know [e-mail] isdasdasd";
 
        int flags = Pattern.UNIX_LINES | Pattern.MULTILINE;
        Pattern pattern = Pattern.compile(regularExp, flags);
        Matcher m = pattern.matcher(inputString);
 
        boolean found = false;
        while (m.find()) {
            System.out.format("location[%d, %d]=\"%s\"%n", m.start(), m.end(), m.group());
            found = true;
        }
        if(!found){
            System.out.println("No match found.");
        }
    }
}
 

[BigDaddyLH]

Yes, but it does not work if I give more data as below:

I think that's because your pattern is "^...$" so it has to match an entire line.