/**
  * Constructs a String of the fixed length given. If the string passed in is greater than length,
  * then the string is truncated to length. If the string is greater than length then the string is
  * padded with spaces. If s is empty or null, then an empty string of spaces is returned.
  *
  * @param s - string to operate on
  * @param length - desired length
  * @return - fixed length String
  */
 public static String createFixedLengthString(String s, int length) {
   String result = null;
   if (StringUtil.isEmpty(s)) {
     StringBuffer sb = new StringBuffer(length);
     for (int i = 0; i < length; i++) {
       sb.append(" ");
     }
     result = sb.toString();
   } else {
     if (s.length() == length) {
       result = s;
     } else if (s.length() > length) {
       result = s.substring(0, length);
     } else { // s.length() is < length
       StringBuffer sb = new StringBuffer(length);
       sb.append(s);
       for (int i = s.length(); i < length; i++) {
         sb.append(" ");
       }
       result = sb.toString();
     }
   }
   return result;
 }
 public static void main(String args[]) {
   byte[] testCommand = {0x2, 0x35, 0x35, 0x35, 0x35, 0x20, 0x36, 0x36, 0x36, 0x36, 0xA};
   Vector commands = StringUtil.parseCommand(testCommand);
   System.out.println("Vector size=" + commands.size());
 }