Package org.apache.commons.io

Class Charsets

java.lang.Object
org.apache.commons.io.Charsets
public class Charsets extends Object
Charsets required of every implementation of the Java platform. From the Java documentation Standard charsets:

Every implementation of the Java platform is required to support the following character encodings. Consult the release documentation for your implementation to see if any other encodings are supported. Consult the release documentation for your implementation to see if any other encodings are supported.

  • US-ASCII
    Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character set.
  • ISO-8859-1
    ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1.
  • UTF-8
    Eight-bit Unicode Transformation Format.
  • UTF-16BE
    Sixteen-bit Unicode Transformation Format, big-endian byte order.
  • UTF-16LE
    Sixteen-bit Unicode Transformation Format, little-endian byte order.
  • UTF-16
    Sixteen-bit Unicode Transformation Format, byte order specified by a mandatory initial byte-order mark (either order accepted on input, big-endian used on output.)
Since:
2.3
See Also:

  • Field Details

    • ISO_8859_1

      @Deprecated public static final Charset ISO_8859_1
      Deprecated.
      Use Java 7's StandardCharsets
      CharEncodingISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1.

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

    • US_ASCII

      @Deprecated public static final Charset US_ASCII
      Deprecated.
      Use Java 7's StandardCharsets

      Seven-bit ASCII, also known as ISO646-US, also known as the Basic Latin block of the Unicode character set.

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

    • UTF_16

      @Deprecated public static final Charset UTF_16
      Deprecated.
      Use Java 7's StandardCharsets

      Sixteen-bit Unicode Transformation Format, The byte order specified by a mandatory initial byte-order mark (either order accepted on input, big-endian used on output)

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

    • UTF_16BE

      @Deprecated public static final Charset UTF_16BE
      Deprecated.
      Use Java 7's StandardCharsets

      Sixteen-bit Unicode Transformation Format, big-endian byte order.

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

    • UTF_16LE

      @Deprecated public static final Charset UTF_16LE
      Deprecated.
      Use Java 7's StandardCharsets

      Sixteen-bit Unicode Transformation Format, little-endian byte order.

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

    • UTF_8

      @Deprecated public static final Charset UTF_8
      Deprecated.
      Use Java 7's StandardCharsets

      Eight-bit Unicode Transformation Format.

      Every implementation of the Java platform is required to support this character encoding.

      See Also:

  • Constructor Details

  • Method Details

    • requiredCharsets

      public static SortedMap<String,Charset> requiredCharsets()
      Constructs a sorted map from canonical charset names to charset objects required of every implementation of the Java platform.

      From the Java documentation Standard charsets:

      Returns:
      An immutable, case-insensitive map from canonical charset names to charset objects.
      Since:
      2.5
      See Also:

    • toCharset

      public static Charset toCharset(Charset charset)
      Returns the given Charset or the default Charset if the given Charset is null.
      Parameters:
      charset - A charset or null.
      Returns:
      the given Charset or the default Charset if the given Charset is null

    • toCharset

      public static Charset toCharset(Charset charset, Charset defaultCharset)
      Returns the given charset if non-null, otherwise return defaultCharset.
      Parameters:
      charset - The charset to test, may be null.
      defaultCharset - The charset to return if charset is null, may be null.
      Returns:
      a Charset .
      Since:
      2.12.0

    • toCharset

      public static Charset toCharset(String charsetName) throws UnsupportedCharsetException
      Returns a Charset for the named charset. If the name is null, return the default Charset.
      Parameters:
      charsetName - The name of the requested charset, may be null.
      Returns:
      a Charset for the named charset.
      Throws:
      UnsupportedCharsetException - If the named charset is unavailable (unchecked exception).

    • toCharset

      public static Charset toCharset(String charsetName, Charset defaultCharset) throws UnsupportedCharsetException
      Returns a Charset for the named charset. If the name is null, return the given default Charset.
      Parameters:
      charsetName - The name of the requested charset, may be null.
      defaultCharset - The name charset to return if charsetName is null, may be null.
      Returns:
      a Charset for the named charset.
      Throws:
      UnsupportedCharsetException - If the named charset is unavailable (unchecked exception).
      Since:
      2.12.0