Newbie in regex... pb with pattern

Hello,
I want to identify each occurence of -> <tr bgcolor="#f7f7f7"> <- in a html code source, this string could be written like this -> <td class="t2" bgcolor="#f7f7f7"> <-...
I try the fallowing java code to parse it :
Pattern p=Pattern.compile("<tr bgcolor=\"#f7f7f7\">"); <** CORRET ;-) **>or
Pattern p=Pattern.compile("<td[ class=\"t2\"]? bgcolor=\"#f7f7f7\">"); <** FALSE **>or
Pattern p=Pattern.compile("<td[ class=\"t2\"]?? bgcolor=\"#f7f7f7\">"); <** FALSE **>or
Pattern p=Pattern.compile("<td[ class=\"t2\"]?+ bgcolor=\"#f7f7f7\">"); <** FALSE **>which one do I have to use ??
thx
stuuf

In a regex, square brackets are used to create a character class, which means "match any one of this set of characters". You're using a character class to match a specific sequence of characters, which is incorrect. It happens to work in this case, but you should really use grouping (parentheses) for that. For instance, if you only wanted to match tags of the form <tr bgcolor="#f7f7f7"> or <tr class="t2" bgcolor="#f7f7f7"> but not, e.g., <tr class="t1" bgcolor="#f7f7f7"> or <tr bgcolor="#f7f7f7" class="t2"> you could put the class="t2" part in a group and make the group optional, like so: Pattern p = Pattern.compile("<tr (class=\"t2\" )?bgcolor=\"#f7f7f7\">");For a correct use of character classes, suppose you want to match either tr or td tags with the bgcolor="#f7f7f7" attribute (and you don't care about any other attributes). This slight variation on yawmark's solution would do the trick: Pattern p = Pattern.compile("<t[dr] .*?bgcolor=\"#f7f7f7\".*?>");If you want to learn more about regexes, here's a good place to start: http://www.regular-expressions.info/

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Check string validity with pattern

hello,
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i want to check this string with a pattern but it does not work.
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try this:
import java.sql.*;
import java.io.*;
import java.util.regex.*;
import java.util.*;
public class RegExTest2 {
public static void main (String args[]) {
Pattern pat = null;
Matcher m = null;
String patternToMatch = "^[a-zA-Z0-9\\.\\*\\-\\_@\\s]+$";
String line1 = "IndianaJones";
String line2 = "Indiana Jones";
String line3 = "Indiana - Jones";
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String line5 = "Indiana & Jones";
String line6 = " Indiana Jones ";
String line7 = "Indiana Jones =";
pat = Pattern.compile(patternToMatch);
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bol = Pattern.matches(patternToMatch, line3);
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bol = Pattern.matches(patternToMatch, line4);
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bol = Pattern.matches(patternToMatch, line5);
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bol = Pattern.matches(patternToMatch, line6);
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Hello,
I have a specific matchcode for searching on material numbers with a function module as selection method.
In this function module, the SELECT clause is built dynamically as bellow.
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        INTO CORRESPONDING FIELDS OF TABLE result_tab UP TO CALLCONTROL-MAXRECORDS ROWS
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We are in SAP_BASIS 700.

I think it can be done.
I have -
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And it returns all values with pattern 'Z_00'.
(Z1_001, Z1_002 etc.)
If the pattern '50*' is not working, you could try using '50+++'.
Regards,
MaryM

Problem with pattern numeric field

Hi All.
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The result you're getting is correct, because you pattern only allows a period to separate the decimal places.
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Hello everybody !!
I'd like to use the Regex Package to find the following Pattern in the following expression:
PATTERN = prim*bbb
INPUT = xxx prim yyy xxx prim aaa bbb ddd
and I would like to obtain two results in the same matching:
1=> prim yyy xxx prim aaa bbb
2=> prim aaa bbb
When I try I obtain just the first one as you can see below:
Current REGEX is: prim.*bbb
Current INPUT is: xxx prim yyy xxx prim aaa bbb ddd
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I found the text "prim yyy xxx prim aaa bbb" starting at index 4 and ending at i
ndex 29.
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Thanks a lot !!

Ok here is something that I wrote up.
Keep in mind I do not have java 1.4 installed so I could not compile nor test this code.
It seems like a crazy way to do it , but I can't think of any other way at this time.
Basically find the String, Trim off the prim and bbb and try to find it again, repeat untill there is not a gap between prim and bbb or maybee a gap of only 1 , was not sure what your exit point would be.
Hopefully maybee this will help , or not confuse. :-)
while(matcher.find()) {
String matchedString = matcher.group();
System.out.println("I found the text \"" + matcher.group()
+ "\" starting at index " + matcher.start()
+ " and ending at index " + matcher.end() + ".");
// call this method to search for inner matches
findInnerMatch(matchedString);
public void findInnerMatch(String matchedString,String regex) {
// get the string between prim and bbb *** check index's etc...
String innerString = matchedString.substring(matchedString.indexOf("prim"),matchedString.lastIndexOf("bbb")-1);
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Pattern pattern = Pattern.compile(regex);
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if (matcher.find()) {
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System.out.print("Found: " + innerString);
// see if there is a gap between prim and bbb *** check index's etc..
while (innerString.indexOf("prim") < innerString.lastIndexOf("bbb")) {
// if more check again another occurance
findInnerMatch(innerString);
}

RegEx, need help with pattern matching

im going thru a list of Strings...and id like to match some input to it..but the tutorial for regex wont let me find a smaller string within a bigger one if it exists
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i think the only way regex will work is if i group the entire thing into
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thanks

No, that is not correct. A regex can be constructed to return a match on anything you want. A single character, a newline character, a numeric character and any combination of them. There are limitless possibilities for pattern matching.
See here:
http://java.sun.com/j2se/1.4.1/docs/api/java/util/regex/Pattern.html
Any of the patterns may be compiled into a regex for searching using the matcher.
An alternative is to use the indexOf method of the string class to find what you are looking for.
Example:
String myString = "java.sun.com";
String matchThis = "n.co";
int patternFoundAtThisIndexPosition = myString.indexof(matchThis);patternFoundAtThisIndexPosition will be 7;
or simply:
int index = myString.indexof("sun");index will be 5;

Java.util.regex and replacing patterns with function calls

Hi everyone,
I'm in terrible need for help.
Any advice is much appreciated.
I have the following sentence in a file. The sequence of numbers is actually a
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Here is an example:
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[block]
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[end block]
So I need to change the above block so that my sentence looks like this.
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If anyone has suggestion, please let me know.
Thanks in advance.
Peter
[email protected]

Never mind, I was able to figure it out....
Common2 cm = new Common2();
Pattern p = Pattern.compile("[0-9]{9,10}+");
Matcher m = p.matcher("");
m = p.matcher(s1);
while ((found = m.find())) {
String replaceStr = m.group();
System.out.print("\tReplaceString is: " + replaceStr);
replaceStr = cm.get_date(replaceStr);
System.out.println("\t\tConverted to: " + replaceStr);
m.appendReplacement(buf,replaceStr);
m.appendTail(buf);
----------------- The get_date method in Common2 looked like this ------------------------------
public String get_date(String myString)
String s;
long lsecs = Long.parseLong(myString);
lsecs = lsecs * 1000; // its now milliseconds.
// Determine default calendar and then the offset to GMT.
Calendar localCalendar = Calendar.getInstance();
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(Calendar.ZONE_OFFSET);
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Date GMTdate = new Date(lsecs - offset);
// Format date
Format myformat;
myformat = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss a z ");
s = myformat.format(GMTdate);
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Peter

Search and replace, with pattern matching using a table

I need to inspect a data stream and standardise a set of codes. I need to
1. Match any patterns with a dash character and remove the dash and any following characters, eg BN-S -> BN, BN-SH -> BN, ARG-22 -> ARG, etc.
2. Make a few specific word for word replacements, eg, PAEDSH -> PAED
This is easy to hard code but can it be done using a table of regex substitutions? Can anyone give a pointer or link to some example code? The couple of regex replacement examples I've found use regex to locate but hard code substitutions.
Thanks

You could store all your patterns in a Map. Then iterate over the map inserting the patterns into a regex.

RegEx Problem with flag COMMENTS

Hello,
I have the following Exception:
java.util.regex.PatternSyntaxException: Unclosed group near index 9
when my program is running with this flags:
Pattern patt = Pattern.compile("^(@#@.+)$", Pattern.MULTILINE | Pattern.COMMENTS);but when I run this:
Pattern patt = Pattern.compile("^(@#@.+)$", Pattern.MULTILINE);it works fine.
Any COMMENTS ;-) for this problem? The entire RegEx is much bigger. I want to comment it.
Thanks sacrofano

Hi,
thanks for your help, but it did not work.I did not suggest anything that would work! I was trying to point out that the Javadoc says that everything from # to the end of the pattern is treated as comment.
I run this
Pattern patt =
Pattern.compile("^(?:(@#@.+))$",(Pattern.COMMENTS));[/
code]So why, based on reading the Javadoc, would you expect this RE to compile? Everything after the # is treated as comment so your effective regular expression is "^(?:(@" which is obviously an invalid RE!
with same exception as above.
Is there a problem with the Flag Pattern.COMMENTSNo! RTFD.

***Need Regex for a pattern

Hello,
I need a pattern for the following use cases: I am using Java
1. var so = nokia.device.load('abc','abc');
2. var so = nokia.device.load("abc","abc");
3. var so = nokia.device.load("abc");
4. var so = nokia.device.load('abc');
// 5. var so = nokia.device.load('abc'); (Line is commentted)+
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Thanks,
Mallikarjun.
Edited by: arjun2010 on Apr 26, 2010 9:36 PM

I'll let the fact that the requirement is very dodgy slide for a moment. It seems that a pattern might not be the solution here; why not do something like the following:
SWEEP 1:
- scan through the code one character at a time, looking for comment blocks and comment lines.
- remove all comment blocks from the code (or rather, copy all parts that are not comments to a new buffer)
now you have code cleaned of all comments
SWEEP 2:
- scan for 'noka.device.load' and extract those pieces of code with some clever string comparisons.
Of course I don't know the why behind this requirement, but if I had to implement such a crude requirement I'd do it as simple as possible in stead of as clean as possible.

Newbie in regex... pb with pattern

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