Is Java RegEx case-insensitive?

Question

In Java, when doing a replaceAll to look for a regex pattern like:

replaceAll(\"\\\\?i\\\\b(\\\\w+)\\\\b(\\\\s+\\\\1)+\\\\b\", \"$1\"); 

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Answer 1

You can also match case insensitive regexs and make it more readable by using the Pattern.CASE_INSENSITIVE constant like:

Pattern mypattern = Pattern.compile(MYREGEX, Pattern.CASE_INSENSITIVE);
Matcher mymatcher= mypattern.matcher(mystring);