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I can't get my head around how regular expressions are done and am trying to get a replace statement to work with one.

I am trying to put a space around everything but numbers and decimals

mathEquation = mathEquation.replaceAll("\\D(?!$)", " $0 ");

That works with everything other than numbers but it still adds spaces around decimals (since the \\D includes decimals). I don't know how to exclude the decimals from the search / replace though.

If someone could help me create the regex I'm looking for or lead me towards the answer I'd appreciate it.

Thanks if you reply.

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1 Answer

up vote 3 down vote accepted

Try this:

mathEquation = mathEquation.replaceAll("[^\\d.](?!$)", " $0 ");

I added a character class for not digits or dot.

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Thanks, worked perfectly. Appreciate the help. –  user1228643 Mar 28 '12 at 23:06
    
Please accept the answer it solved your problem. –  kirdie Mar 28 '12 at 23:23
    
Oh, sorry. Accepted it now. –  user1228643 Mar 28 '12 at 23:29
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