}

    public void test_resolve_invalid_brackets() {
        IdnDnsResolver resolver = new IdnDnsResolver();

        // Test empty brackets - should be treated as invalid hostname
        try {
            resolver.resolve("[]");
            fail("Should throw UnknownHostException for empty brackets");
        } catch (UnknownHostException e) {
            // Expected behavior
        }
    }

        }
    }

    /**
     * Formats an IP address string for use in a URL.
     * IPv6 addresses are wrapped in brackets, IPv4 addresses are returned as-is.
     *
     * @param address the IP address string to format
     * @return the formatted address (IPv6 with brackets, IPv4 unchanged)
     */
    public static String formatForUrl(final String address) {
        if (address == null) {
            return null;

   *   <li>An IPv6 address string with or without brackets, like {@code [2001:db8::1]} or {@code
   *       2001:db8::1}
   * </ul>
   *
   * @throws IllegalArgumentException if the specifier is not valid.
   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.

    /**
     * Resolves the given host name to an array of IP addresses.
     * The host name is first converted to ASCII using IDN before resolution.
     * IPv6 addresses in bracket notation (e.g., [::1] or [2001:db8::1]) are
     * handled specially by removing the brackets before resolution.
     *
     * @param host the host name to resolve
     * @return an array of IP addresses for the host

As the type, put `list`.

As the list is a type that contains some internal types, you put them in square brackets:

{* ../../docs_src/python_types/tutorial006_py39.py hl[1] *}

/// info

Those internal types in the square brackets are called "type parameters".

In this case, `str` is the type parameter passed to `list`.

///

### Headings

1) Follow the existing Japanese style: short, descriptive headings (often noun phrases), e.g. 「チェック」.
2) Do not add a trailing period at the end of headings.

### Quotes

1) Prefer Japanese corner brackets 「」 in normal prose when quoting a term.
2) Do not change quotes inside inline code, code blocks, URLs, or file paths.

### Ellipsis

1) Keep ellipsis style consistent with existing Japanese docs (commonly `...`).

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a

        String actualString = response.toString();
        assertTrue(actualString.startsWith("Trans2SetFileInformationResponse["),
                "The string representation should start with the class name.");
        assertTrue(actualString.endsWith("]"), "The string representation should end with a bracket.");
    }

        «««
        ## Typhinweise und –annotationen { #type-hints-and-annotations }
        »»»

3.2) Do not apply rule 3 to the untranslated part of the heading inside curly brackets, which you shall not translate.


### German instructions, when to use and when not to use hyphens in words (written in first person, which is you)

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "[]"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a