Regular expression-JAVA

Question

I have a configuration file in which I am replacing some placeholder(variables) with their actual value after parsing an excel file. I am using the below pattern:

word = word.startsWith("$") ? word.substring(1) : word;
                  return input.replaceAll(Pattern.quote("$"+word),
                   Matcher.quoteReplacement(prefix));

The above is replacing all the sub-strings as well as is case sensitive. For example if I have the below 2 variables: $Building $Building1 , both are different variables. But the above replaces the value of Building in both cases and appends it with "1" in the second case. Could you guys please help me change the pattern. I have tried case_insensitive option but that did not work fine.

Avinash Raj · Accepted Answer · 2015-04-13 06:07:58Z

4

You can use a word boundary \b:

return input.replaceAll(Pattern.quote("$"+word) + "\\b",
                                      Matcher.quoteReplacement(prefix));

edited Apr 13, 2015 at 6:07

Avinash Raj

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answered Apr 13, 2015 at 6:07

Eng.Fouad

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5 Comments

sahana Over a year ago

Thanks! But i am thinking it looks for a boundary in the above case. In my case there could be a space between two variables or not

sahana Over a year ago

Also how do I make it case insensitive?

Eng.Fouad Over a year ago

@sahana use (?i) as prefix.

sahana Over a year ago

I have tried (?i) in front of word like----------- return input.replaceAll(Pattern.quote("$"+(?i)word) + "\\b", Matcher.quoteReplacement(prefix));-- it does not work. Could you correct me

Eng.Fouad Over a year ago

put (?i) before Pattern: "(?i)" + Pattern...

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