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Java Pattern UNICODE_CHARACTER_CLASS Field with Example

Enable the predefined character classes and POSIX character classes in Unicode version.

Example

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class UNICODE_CHARACTER_CLASS_Example {
   public static void main(String args[]) {
      String regex = \"\u00de\";
      //Compile the regular expression
      Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CHARACTER_CLASS);
      //Retrieve the matcher object
      String str[] = {\"\u00de\", \"\u00fe\", \"\u00ee\", \"\u00ce\"};
      for(String ele : str) {
         Matcher matcher = pattern.matcher(ele);
         if(matcher.matches()) {
            System.out.println(ele+" is a match for "+regex);
         } else {
            System.out.println(ele+" is not a match for "+regex);
         }
      }
   }
}

Output Result

Þ is a match for Þ
þ is a match for Þ
î is not a match for Þ
Î is not a match for Þ