CODEWITHSUNDEEP
javaregex
KDJ
KDJ

Reputation: 79

Java Regexp matching exact word

I have this java regular expression.

        Pattern regex = Pattern.compile("(\\£\\d[\\d\\,\\.]+)[k|K]");
        Matcher finder = regex.matcher(price);
        if(finder.find()){
               etc;
        }

Note ... java

I'm trying to match whole word k or K not kilo or kilometer. IVe tried \\bk\\b but the online testers show no match. Has it something to do with square brackets.

Thank you in advance

Upvotes: 0

Views: 85

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626926

Beside the fact that currently your pattern matches a k or K before any char, it does not match values like £1k as the + quantifier requires another digit, dot or comma before k or K.

Also note that [\\b] does not match a word boundary, it only matches a b letter.

Putting a \b between [\\d\\,\\.]+ and [k|K] is not a good idea since there is always a word boundary between . / , and k, and there is no word boundary between a digit and k.

You need to use

Pattern regex = Pattern.compile("(£\\d[\\d,.]*)[kK]\\b");

Details

  • (£\\d[\\d,.]*) - Group 1:
    • £ - a pound sign
    • \\d - a digit
    • [\\d,.]* - zero or more digits, , or .
  • [kK] - a k or K
  • \\b - a word boundary (there must be end of string or a non-word char after k or K)

Upvotes: 1

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