Java regex example

Main.java

import java.util.regex.Pattern;
import java.util.regex.Matcher;

class Main {
  public static void main(String[] args) {
    String s = "여기는.어디.입니까-12";
    Pattern p = Pattern.compile("^([^.]+\\.[^.]+\\.[^-.]+)(?:-([0-9]{2}))?$");
    Matcher m = p.matcher(s);
    
    if(m.find()) {
      String wordonly = m.group(1);
      String cellNum = m.group(2);
    
      System.out.println(wordonly);
      if(cellNum != null) { System.out.println(cellNum); }
      else { System.out.println("44"); }
    } else {
      System.out.println("Malformed 3word");
    }
  }
}