Thread: Pattern, regex (regular expression) case sensitivity question

i have a clarification answer with a simple case sensitivity question with the code below

import java.util.regex.Pattern;
 
public class NewClass6 {
 
    public static void main(String[] args) {
 
        Pattern patt = Pattern.compile("[aeiou]", Pattern.CASE_INSENSITIVE);
        String temp = "A";
 
        if (temp.matches(patt.pattern())) {
 
            System.out.println("MATCH!");
        }
    }
}

given that i already using Pattern class doing a bussiness with the Matcher(Pattern-matching),
in this case the String object(temp) that refers to a string value doesnt matches the pattern even if it has been compiled in a
CASE_INSENSITIVE manner..

is it because the statement patt.pattern() ONLY RETURNS a pattern, but the case sensitivity manner doesnt/cannot do anything?

is it because the statement patt.pattern() ONLY RETURNS a pattern

Yes. You can include a case-insensitive switch in the pattern instead of using the separate flags int. See the 'Special constructs' in the API doc.