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# regular expression java

Posted on 2014-04-07
Medium Priority
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I am writing a business rule, where the value should be between 1X - 126Y

which means it taken values 1X , 2X... 126X ,  and 1Y , 2Y.. 126Y

Regards
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Question by:akp007
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LVL 75

Expert Comment

ID: 39984315
If I understand your requirement correctly, then you can try:

^(12[0-6]|1[0-1]\d|[1-9]\d|[1-9])[XY]\$
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Expert Comment

ID: 39984359
Sounds to me like you need to parse into an int and evaluate arithmetically
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LVL 77

Expert Comment

ID: 39984650

How are the values stored(is this where Oracle comes into the question)?
How are the search values provided?

Just a guess here:
You have some value and you want both the number portion and letter portion to be between some data set.

So 9G will be between 1A and 10H but not 1H and and 9G will be between 1A and 100Z but not 10A and 13H?

If so, how are the start and end ranges stored?
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Author Comment

ID: 39984722
this is regular expression question. we have business rules with drools.

User should enter the values between 1X and 126Y

the answer given by kaufmed works.. But it is not validating..

Let say if enter 11Y , 20X, 40Y etc..,

means it working for any value (11-119)XY

thanks for helping me out
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LVL 35

Expert Comment

ID: 39984725
@kaufmed's pattern looks good to me. Are you using the Java regex functions directly (if so, perhaps you could show us the code), or is the pattern applied through some other means?

Also can you please explain what you mean by saying it works, but is not validating?
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Author Comment

ID: 39984825
this is how I  am using

scenario.getString("MyString").trim().matches("^(12[0-6]|1[0-1]\d|[1-9]\d|[1-9])[XY]\$")==false);

Thanks
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Accepted Solution

käµfm³d   👽 earned 2000 total points
ID: 39984858
You need to double up the backslashes--since this is Java:

scenario.getString("MyString").trim().matches("^(12[0-6]|1[0-1]\\d|[1-9]\\d|[1-9])[XY]\$")==false);
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Author Closing Comment

ID: 39986159
It worked thanks a lot , only bit of change that I had to was

matches("^(12[0-6]|1[0-1]\\\\d|[1-9]\\\\\d|[1-9])[XY]\$")==false)

Regards
0

LVL 75

Expert Comment

ID: 39987364
Doh! I forgot you need quadruple backslashes in Java. Good catch   = )
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LVL 35

Expert Comment

ID: 39990325
I don't think you need to quadruple them unless you're wanting to match a literal backslash character, but perhaps I'm missing something...
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LVL 75

Expert Comment

ID: 39990337
Terry, you may be right. I didn't plug it into Java to test. I just remember having to do so one other time that I was working in Java. Perhaps I was trying to match a UNC path, though.
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