An OutputStreamWriter is a bridge from character streams to byte streams:
Characters written to it are encoded into bytes using a specified
charset
. The charset that it uses
may be specified by name or may be given explicitly, or the platform's
default charset may be accepted.
Each invocation of a write() method causes the encoding converter to be
invoked on the given character(s). The resulting bytes are accumulated in a
buffer before being written to the underlying output stream. The size of
this buffer may be specified, but by default it is large enough for most
purposes. Note that the characters passed to the write() methods are not
buffered.
For top efficiency, consider wrapping an OutputStreamWriter within a
BufferedWriter so as to avoid frequent converter invocations. For example:
Writer out
= new BufferedWriter(new OutputStreamWriter(System.out));
A surrogate pair is a character represented by a sequence of two
char values: A high surrogate in the range '\uD800' to
'\uDBFF' followed by a low surrogate in the range '\uDC00' to
'\uDFFF'.
A malformed surrogate element is a high surrogate that is not
followed by a low surrogate or a low surrogate that is not preceded by a
high surrogate.
This class always replaces malformed surrogate elements and unmappable
character sequences with the charset's default substitution sequence.
The CharsetEncoder class should be used when more
control over the encoding process is required.