protected int findUTCSign(String buffer,int start,int end){
  int c;
  for (int i=start; i < end; i++) {
    c=buffer.charAt(i);
    if (c == 'Z' || c == '+' || c == '-') {
      return i;
    }
  }
  return -1;
}

protected int findUTCSign ( String buffer , int start , int end ) { int c ; for ( int i = start ; i < end ; i ++ ) { c = buffer . charAt ( i ) ; if ( c == 'Z' || c == '+' || c == '-' ) { return i ; } } return - 1 ; }
return index of utc char : ' z ' , ' + ' , ' - '
