IDNA

public class IDNA

This class offers static methods for converting internationalized domain names to ACE and back.

  • RFC3490 IDNA

Note that this implementation only supports 16-bit Unicode code points.

Fields

ACE_PREFIX

public static final String ACE_PREFIX

Methods

toASCII

public static String toASCII(String input)

Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1. Unassigned characters are not allowed and STD3 ASCII rules are enforced. The input string may be a domain name containing dots.

Parameters:
  • input – Unicode string.
Returns:

Encoded string.

toASCII

public static String toASCII(String input, boolean allowUnassigned, boolean useSTD3ASCIIRules)

Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1. Unassigned characters are not allowed and STD3 ASCII rules are enforced.

Parameters:
  • input – Unicode string.
  • allowUnassigned – Unassigned characters, allowed or not?
  • useSTD3ASCIIRules – STD3 ASCII rules, enforced or not?
Returns:

Encoded string.

toUnicode

public static String toUnicode(String input)

Converts an ASCII-encoded string to Unicode. Unassigned characters are not allowed and STD3 hostnames are enforced. Input may be domain name containing dots.

Parameters:
  • input – ASCII input string.
Returns:

Unicode string.

toUnicode

public static String toUnicode(String input, boolean allowUnassigned, boolean useSTD3ASCIIRules)

Converts an ASCII-encoded string to Unicode.

Parameters:
  • input – ASCII input string.
  • allowUnassigned – Allow unassigned Unicode characters.
  • useSTD3ASCIIRules – Check that the output conforms to STD3.
Returns:

Unicode string.