Re: Regular Expression - Part II

What I would do is make a short test program to test your expressions.
Here is one I found somewhere.

import java.io.*;
import java.util.regex.*;

public final class RegexTestHarness {

    private static String REGEX;
    private static String INPUT;
    private static BufferedReader br;
    private static Pattern pattern;
    private static Matcher matcher;
    private static boolean found;

    public static void main(String[] argv) {
        initResources();
        processTest();
        closeResources();
    }

    private static void initResources() {
       try {
           br = new BufferedReader(new FileReader("regex.txt"));
       }
       catch (FileNotFoundException fnfe) {
            System.out.println("Cannot locate input file!
"+fnfe.getMessage());
            System.exit(0);
        }
       try {
           REGEX = br.readLine();
           INPUT = br.readLine();
       } catch (IOException ioe) {}

        pattern = Pattern.compile(REGEX);
        matcher = pattern.matcher(INPUT);

        System.out.println("Current REGEX is: "+REGEX);
        System.out.println("Current INPUT is: "+INPUT);
    }

    private static void processTest() {
        while(matcher.find()) {
            System.out.println("I found the text \"" + matcher.group() +
                               "\" starting at index " + matcher.start()
+
                               " and ending at index " + matcher.end() +
".");
            found = true;
        }

        if(!found){
            System.out.println("No match found.");
        }
    }

    private static void closeResources() {
       try{
           br.close();
       }catch(IOException ioe){}
    }
}

Try these web sites for examples:
http://java.sun.com/docs/books/tutorial/extra/regex/quant.html
// The link below has some useful test code.
http://www.idg.net/english/crd_java_1145474.html
http://java.sun.com/j2se/1.4.1/docs/api/java/util/regex/Pattern.html
http://www.regexlib.com/Search.aspx
http://javaalmanac.com/egs/java.util.regex/pkg.html
http://www.linuxjournal.com/article.php?sid=5916


Tom Kochanowicz




-----Original Message-----
From: A mailing list for discussion about Sun Microsystem's Java Servlet
API Technology. [mailto:[email protected]] On Behalf Of
karthikeyan.balasubramanian
Sent: Wednesday, June 04, 2003 1:37 PM
To: [email protected]
Subject: Regular Expression - Part II

Hi guys,

I am using this package.  Hopefully people might know that i asked this
doubt few post before.
I made some start but just couldnt finish it.

http://jregex.sourceforge.net/gstarted.html#searching

  Help me here.

  I m trying out regular expression which can do something like this in
java.

<input type='checkbox' name='8' value='505'>some dynamic text MATCHING
TEXT</input>

and replaces this with

<input type='checkbox' name='8' value='505' DISABLED>some dynamic text
MATCHING TEXT</input>

I basically want something like this in a string for pattern searching:

String str1 = "<input type='checkbox' name='8' value='505' ";
String str2 = ">some dynamic text";
String str3 = "MATCHING TEXT";
String str4="</input>";

Pattern p= new Pattern(str1  str2  str3  str4;);
Replacer r=p.replacer("[$1, $2, $3 DISABLED, $4]");
prodInfo ="<input type='checkbox' name='8' value='505'>some dynamic text
MATCHING TEXT</input>";
String result=r.replace(prodInfo);

I m not very good at regular expression, so i basically know the steps
but
just couldnt get the right expression
to pass it on to Pattern class.

Any help would be appreciated.

<snip>
I tried this but cant go beyond this.
(?ism)<(\w+ \w+)=(\'\w+\') (\w+)=(\'\w+\') (\w+)=(\'\w+\')>(?s)\w+
</snip>

Looking forward for some response.

Have a great day.

Karthikeyan.

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