String charToString(char c){
  if (c < ' ' || c > 127) {
    return "\\" + (int)c;
  }
  return String.valueOf(c);
}

String charToString ( char c ) { if ( c < ' ' || c > 127 ) { return "\\" + ( int ) c ; } return String . valueOf ( c ) ; }
return a string describing a ( possibly unprintable ) character .
