CODEWITHSUNDEEP
regexstring
leomeurer
leomeurer

Reputation: 752

Replace regex pattern

I need to find a pattern in a Java String and replace for another string.

I have two kinds of Strings

1- Lorem ipsum dolor sit amet, it. Integer pos laciniA. 2. Lorem ipsum dolorelit. Curabitur pretium maL.

What I need to do is to find a "." that don't have a number before it and replace by ";"

I've found the regex to do this like str.replaceAll('\.', '\\;');

The problem with this patter is that when it find the String "2." it changes by "2;"

Another solution is str.replaceAll('[a-zAz]\.', '\\;'); but it replace the last letter before ".".

Someone can help-me with this?

Upvotes: 1

Views: 50

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626845

What I need to do is to find a "." that don't have a number before it and replace by ";"

You may leverage a negative lookbehind:

String result = str.replaceAll("(?<!\\d)\\.", ";");

See the regex demo

Details:

  • (?<!\d) - fails the match if there is a digit before the current location
  • \. - matches a literal .

Upvotes: 1

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