import java.util.regex.Pattern;
 
class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
      String test = "3๓३\u16ee\u00b2";
      for ( int i = 0 ; i < test.length() ; i++ ) {
          System.out.print("Character: " + test.charAt(i) + " - isDigit: " + Character.isDigit(test.charAt(i)));
          System.out.println("; Pattern: " + Pattern.matches("\\p{N}", test.substring(i,i+1)));
          if ( Character.isDigit(test.charAt(i)) != Pattern.matches("\\p{N}", test.substring(i,i+1)) )
              System.out.println("[ERROR: different results!]");
      }
  }
}
 

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