*/
    private StringUtil () {}


    /**
     * Implementation of {@link java.lang.String#join} backported for JDK7.
     * 
     * @param delimiter
     * @param elements
     * @return elements separated by delimiter
     */
    public static String join ( CharSequence delimiter, CharSequence... elements ) {
        StringBuilder sb = new StringBuilder();
        for ( CharSequence element : elements ) {

     */
    String ID_COMBINATION_MODE_ATTRIBUTE = "combine.id";

    /**
     * In case of complex XML structures, combining can be done based on keys.
     * This is a comma separated list of attribute names.
     */
    String KEYS_COMBINATION_MODE_ATTRIBUTE = "combine.keys";

    /**
     * This default mode for combining a DOM node during merge means that where element names match, the process will

    // test separators work
    for (int sepLength = 3; sepLength <= 5; sepLength++) {
      for (String separator : ImmutableList.of(",", "\n", ";;", "")) {
        testEncoding(
            encoding.withSeparator(separator, sepLength),
            decoded,
            Joiner.on(separator).join(Splitter.fixedLength(sepLength).split(encoded)));
      }
    }
  }

        }
        return def;
    }


    /**
     * Retrieve an array of <tt>InetAddress</tt> created from a property
     * value containing a <tt>delim</tt> separated list of host names and/or
     * ip addresses.
     */
    public static InetAddress[] getInetAddressArray ( Properties props, String key, String delim, InetAddress[] def ) {
        String p = props.getProperty(key);

    // test separators work
    for (int sepLength = 3; sepLength <= 5; sepLength++) {
      for (String separator : ImmutableList.of(",", "\n", ";;", "")) {
        testEncoding(
            encoding.withSeparator(separator, sepLength),
            decoded,
            Joiner.on(separator).join(Splitter.fixedLength(sepLength).split(encoded)));
      }
    }
  }

      }
    }
    return flip(max);
  }

  /**
   * Returns a string containing the supplied unsigned {@code int} values separated by {@code
   * separator}. For example, {@code join("-", 1, 2, 3)} returns the string {@code "1-2-3"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)

    }
  }

  /**
   * Returns a string containing the supplied {@code byte} values separated by {@code separator}.
   * For example, {@code join(":", (byte) 1, (byte) 2, (byte) 255)} returns the string {@code
   * "1:2:255"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)

 *
 * <p>{@code CacheBuilderSpec} supports parsing configuration off of a string, which makes it
 * especially useful for command-line configuration of a {@code CacheBuilder}.
 *
 * <p>The string syntax is a series of comma-separated keys or key-value pairs, each corresponding
 * to a {@code CacheBuilder} method.
 *
 * <ul>
 *   <li>{@code concurrencyLevel=[integer]}: sets {@link CacheBuilder#concurrencyLevel}.

     */
    @Nonnull
    Optional<String> option();

    /**
     * Returns the option followed by a string representation of the given path elements.
     * The path elements are separated by an option-specific or platform-specific separator.
     * If the given {@code paths} argument contains no element, then this method returns an empty string.
     *
     * <p><b>Examples:</b>

        max = array[i];
      }
    }
    return max;
  }

  /**
   * Returns a string containing the supplied {@code byte} values separated by {@code separator}.
   * For example, {@code join(":", 0x01, 0x02, -0x01)} returns the string {@code "1:2:-1"}.
   *
   * @param separator the text that should appear between consecutive values in the resulting string
   *     (but not at the start or end)