Lexical search using Pattern and Matcher class

Hi Folks,
Need some help with the following Query. I want to find out how I can implement
the following by using Pattern / Matcher classes.
I have a query that returns the following set of strings,
aa
abc
def
ghi
glk
gmonalaks
golskalskdkdkd
lkaldkdldldkdld
mladlad
n33ieler
What I would like do is to find out any string that starts with g and Lexical occurs after ghi. So this will return
ghi / glk / gmonalaks / golskalskdkdkd
How can I accomplish the above, by using the following two classes.
Pattern datePattern = Pattern.compile();
Matcher dateMatcher = datePattern.matcher();
Thanks a bunch...
_Shoe Maker..

Nothing in your specification requires a regex. Loop though the strings until you find the string "ghi". Then continue looping though the strings outputting those where the first characters is 'g' .

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HI Guys,
I am just trying to use Pattern and Matcher classes for my requirement.
My requirement is :- It should allow the numbers from 1-7 followed by a comma(,) again followed by the numbers from
1-7. For example:- 1,2,3,4,5 or 3,6,1 or 7,1,3 something like that.
But it should not allow 0,8 and 9. And also it should not allow any Alphabets and special characters except comma(,).
I have written some thing like..
Pattern p = Pattern.compile("([1-7])+([\\,])?([1-7])?");
Is there any problem with this pattern ??
Please help out..
I am new to pattern matching concept..
Thanks and regards
Sudheer

ok guys, this is how my code looks like..
class PatternTest
     public static void main(String[] args)
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          Matcher m = p.matcher(input);
          if(m.find()) {
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          } else {
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Please correct me if I am wrong.
Actually this is the test code I am presenting here.. I original requirement is..I will be uploading an excel sheets containg 10 columns and n rows.
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Java Regex - Find Last Match Using Pattern and Matcher

I'd like to write some regex which would allow me to grab the last occurance of match based on a specified list of items. So for:
Pattern languageRegex = Pattern.compile("(len|end)");
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I want it to extract "end". However, I'd grab "len" using the above regex.
If it was
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I'd grab "end" which is right.
What regex would allow me to grab "end" rather than "len" from:
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user3940995 wrote:
I have a list of 3 letter codes that I need to check for in a field. The list is finite but about 100 or so items:
len, end, ren, onm, enl, etc.
However, the field I'm checking in has some other data in it which can bleed into the code but the code will always be at the end.
An example would be "000 0rend"
From this I'd want to extract "end". If there is a better way to do this than using regex then I'd be happy to use that, but as I have to process millions of items I'm keen to not loop trying to find a match so I was hoping there would be a regex solution.
Your regex would work for that particular example. I think if I modify it to be
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Then I seem to pick up the last occurance as I'd like to.
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How to use regular expression using pattern and match concept for this scenario?

Hi Guys,
I have a string "We have 7 tutorials for Java, 2 tutorials for Javascript and 1 tutorial for Oracle"
I need to replace the numbers based on the below condition.
if more then 5, replace with many
if less then 5, replace with a few
if it is 1, replace with "only one"
below is my code, I am missing the equating part to replace the numbers could any one of you please help me out fixing this.
private static String REGEX="(\\d+)";
private static String INPUT="We have 7 tutorials for Java, 2 tutorials for Javascript and 1 tutorial for Oracle";
//String pattern= "(.*)(\\d+)(.*)";
private static String REPLACE = "replace with many";
public static void main(String[] args) {
// Create a Pattern object
       Pattern r = Pattern.compile(REGEX);
    // Now create matcher object.
       Matcher m = r.matcher(INPUT);
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Thanks and Regards,

Hi,
Try the following which makes use of "appendReplacement" instead with the "start" and "end" methods to locate and check the searched "regExp" string before dynamically setting the "replace" string:
String regExp = "\\d+";
String input = "We have 7 tutorials for Java, 2 tutorials for Javascript and 1 tutorial for Oracle";
String replace;
Pattern p = Pattern.compile(regExp);
// get a matcher object
Matcher m = p.matcher(input);
StringBuffer sb = new StringBuffer();
while (m.find()) {
   Integer x = Integer.valueOf(input.substring(m.start(), m.end()));
   replace = (x >= 5) ? "many" : (x == 1) ? "only one" : "few";
   m.appendReplacement(sb, replace);
m.appendTail(sb);
System.out.println(sb.toString());
HTH.
Regards,
Rajen
P.S: Please mark the post as answered/helpful if it resolves your issue for the benefit of all community members.

Regular expressions, using pattern and matcher but not include the pattern

Hi all
i have a regular expression but in my matcher it is including the text that is in my regular expression.
ie
String str="-------------------stuff===========";
Pattern mainBody = Pattern.compile("-----(.*?)=====", Pattern.MULTILINE);this matches -------------------stuff=====
now i expect to get some - in there as i match from the start, but i dont want to have the = in the match. how do i do a match that excludes the matching expressions.

nevermind, figured it out
when i do myMatch.group(1) it gives me just my match
sorry for wasting time :)

String.matches vs Pattern and Matcher object

Hi,
I was trying to match some regex using String.matches but for me it is not working (probably I am not using it the way it should be used).
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/* This does not work */
String patternStr = "a";
String inputStr = "abc";
if(inputStr.matches( "a" ))
System.out.println("String matched");
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Pattern p = Pattern.compile( "a" );
Matcher m = p.matcher( "abc" );
boolean found = false;
while(m.find())
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if(!found)
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Am I not matches method of String class properly?
Please throw some lights on this.
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String.matches looks at the whole string.
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<false>
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I was wondering if someone can explain to me the difference between 'Match Pattern' and 'Match Geometric Pattern' VIs? I'm really not sure which best to use for my application. I'm trying to search/match small spherical particles in a grey video in order to track their speed (I'm doing this after subtracting two subsequent frames to get rid of background motion artifacts).
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Thank you!
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Go to Solution.

Hi TKassis,
1.You may find from this link for the difference between these two,
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Geometric Match : http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_match_geometric_pattern/.
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Certified LabVIEW Associate Developer
If you can DREAM it, You can DO it - Walt Disney

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Hey,
I'm trying to use the pattern and matcher to replace all instances of a website
address in some html documents as I process them and post them. I'm
including a sample of some of the HTML below and the code I"m using to
process it. For some reason it doesn't replace the sites in the underlying
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                         //          temporaryLine=new StringBuffer();
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                         /*newTokenTemp=null;
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                              System.out.println("uhhhhhh");
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                                   newToken=newTokenTemp+"//Userguide"+theEndOfIt;
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                              temporaryLine.append(newToken+" ");
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                         endQuestion.append(temporaryLine.toString());
                         //reset the tempquestion to the newline that is going to be read
                         tempQuestion=bufferedReader.readLine();
                         //reset tokenizer to the new temporary question
                         if(tempQuestion!=null)
                         tokenizer=new StringTokenizer(tempQuestion);
               //Set the answer to the stringbuffer after converting to string
               answerText=endQuestion.toString();
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               char theSpace=' ';
               char theUnderline='_';
               questionText=(fileName.getName()).replace(theUnderline, theSpace);
          catch(FileNotFoundException exception)
               if(logger.isLoggable(Level.WARNING))
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               logger.log(Level.SEVERE,exception.getMessage()+"\n"+exception.getStackTrace(),exception);
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                    if(theReader!=null)
                         theReader.close();
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<SCRIPT language=JavaScript1.2 type=text/javascript></SCRIPT>
<H1><IMG class=img_whs1 height=63 src="https://fakesite.com/ics/header4.jpg" width=816 border=0 x-maintain-ratio="TRUE"></H1>
<H1>Associate Existing Customers</H1>
<P>blahalbalhblabhlab blabhalha blabahbablablabhlablhalhab.<SPAN style="FONT-WEIGHT: bold"><B><IMG class=img_whs2 height=18 alt="Submit a

If you use just / it misinterprets it and it ruins
your " " tags for a string. I don't think so. '/' is not a special character for Java regex, nor for Java String.
The reason i used
literal is to try to force it to directly match,
originally i thought that was the reason it wasn't
working.That will be no problem because it enforces '.' to be treated as a dot, not as a regex 'any character'.
Message was edited by:
hiwa

Patterns and Matcher.find()

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MTMISRVLGLIRDQAISTTFGANAVTDAFWVAFRIPNFLRRLFAEGSFATAFVPVFTEVK
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<title>Untitled 2</title>
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</body>
</html>
More information is here:
http://jeffywang.blogspot.com/2014/01/utilizing-spservices-to-call-sharepoint.html
Best Regards
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected].

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No.
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Lexical search using Pattern and Matcher class

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