Solved

Java RegEx Question

Posted on 2004-04-28
10
387 Views
Last Modified: 2010-03-31
I want to build a regular expression that will let me know if a standalone 0 is in the string.  For example, I have the following string:

1 3 10 88 100 0 56
OR
0 4 10 20 45 1000
OR
2 10 44 60 100 0

The regular expression should return true on a match for a standalone 0.  However the string below should return false:

10 35 40 100

Thanks.
0
Comment
Question by:pcarrollnf
  • 4
  • 3
  • 2
  • +1
10 Comments
 
LVL 14

Expert Comment

by:Tommy Braas
ID: 10943784
" 0 "
0
 
LVL 14

Expert Comment

by:Tommy Braas
ID: 10943785
Note the spaces on either side of the 0
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10943801
Pattern p = Pattern.compile("\\s+?0\\s+?");
Matcher m = p.matcher(input);
boolean gotLoneZero = m.find();
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 

Author Comment

by:pcarrollnf
ID: 10943842
That doesn't appear to work.  You have to also keep in mind that the 0 may be the first digit in the string where it will not have any leading spaces and it may be the last digit where it will not have trailing spaces.  It also may be a part of another number such as 10 where it is valid.  So I guess there are 3 scenarios that should fail:

0 1 2
1 2 0
1 0 2

Each number will have a space before the next number unless it is the last one in the string.
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 50 total points
ID: 10943864
Try

("^0\\s+?|\\s+?0\\s+?|\\s+?0$");
0
 
LVL 92

Expert Comment

by:objects
ID: 10943961
Pattern p = Pattern.compile("\\s+?0\\s+?");
Matcher m = p.matcher(" "+input+" ");
boolean foundit = m.find();
0
 
LVL 14

Expert Comment

by:Tommy Braas
ID: 10943992
"(^0 | 0 | 0$)"
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10944029
Identical to mine - only less tolerant of number of spaces
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10944146
8-)
0
 
LVL 92

Expert Comment

by:objects
ID: 10944149
> Identical to mine - only less tolerant of number of spaces

Identical but functions differently, interesting concept :-D
0

Featured Post

ScreenConnect 6.0 Free Trial

Explore all the enhancements in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
GUI builder for Eclipse? 8 35
Oracle SQL syntax check  without executing 6 55
eclipse apache tomcat admin console 52 97
maven module vs maven project 3 23
For customizing the look of your lightweight component and making it look lucid like it was made of glass. Or: how to make your component more Apple-ish ;) This tip assumes your component to be of rectangular shape and completely opaque. (COD…
After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question