Package java.nio.charset

See:
           Description

Class Summary
Charset	A named mapping between sequences of sixteen-bit Unicode code units code units
CharsetDecoder	An engine that can transform a sequence of bytes in a specific charset into a sequence of sixteen-bit Unicode characters.
CharsetEncoder	An engine that can transform a sequence of sixteen-bit Unicode characters into a sequence of bytes in a specific charset.
CoderResult	A description of the result state of a coder.
CodingErrorAction	A typesafe enumeration for coding-error actions.

 

Exception Summary
CharacterCodingException	Checked exception thrown when a character encoding or decoding error occurs.
IllegalCharsetNameException	Unchecked exception thrown when a string that is not a legal charset name is used as such.
MalformedInputException	Checked exception thrown when an input byte sequence is not legal for given charset, or an input character sequence is not a legal sixteen-bit Unicode sequence.
UnmappableCharacterException	Checked exception thrown when an input character (or byte) sequence is valid but cannot be mapped to an output byte (or character) sequence.
UnsupportedCharsetException	Unchecked exception thrown when no support is available for a requested charset.

 

Error Summary
CoderMalfunctionError	Error thrown when the decodeLoop method of a CharsetDecoder , or the encodeLoop method of a CharsetEncoder , throws an unexpected exception.

 

Package java.nio.charset Description

Defines charsets, decoders, and encoders, for translating between bytes andUnicode characters.

Class name	Description
Charset	A named mapping between characters and bytes
CharsetDecoder	Decodes bytes into characters
CharsetEncoder	Encodes characters into bytes
CoderResult	Describes coder results
CodingErrorAction	Describes actions to take when coding errors are detected

A charset is named mapping between sequences of sixteen-bit Unicodecharacters and sequences of bytes, in the sense defined in RFC 2278 . A decoder is an engine which transforms bytes in a specific charset intocharacters, and an encoder is an engine which transforms characters intobytes. Encoders and decoders operate on byte and character buffers. They arecollectively referred to as coders .

The Charset class defines methods for creatingcoders for a given charset and for retrieving the various names associated witha charset. It also defines static methods for testing whether a particularcharset is supported, for locating charset instances by name, and forconstructing a map that contains every charset for which support is availablein the current Java virtual machine.

Most users will not use these classes directly; instead they will use theexisting charset-related constructors and methods in the String class, together with the existing InputStreamReader and OutputStreamWriter classes, allof whose implementations have been reworked to make use of the charsetfacilities defined in this package. A small number of changes have been madeto the InputStreamReader and OutputStreamWriter classes in order to allow explicit charset objects to be specified in theconstruction of instances of those classes.

Support for new charsets can be made available via the interface defined inthe CharsetProvider class in the java.nio.charset.spi package.

Unless otherwise noted, passing a null argument to a constructoror method in any class or interface in this package will cause a NullPointerException to be thrown.

Since:

1.4