public boolean looksLikeNumberComing(){
  if (n >= s.length())   return false;
  return Character.isDigit(s.charAt(n));
}

public boolean looksLikeNumberComing ( ) { if ( n >= s . length ( ) ) return false ; return Character . isDigit ( s . charAt ( n ) ) ; }
peeks the next char , without gobbling it . tells us if it ' s a digit or not .
