All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

Direct Known Subclasses:

FileWriter
```
public class OutputStreamWriter
extends Writer
```
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.
Since:

JDK1.1

See Also:
BufferedWriter, OutputStream, Charset

Field Summary
- Fields inherited from class java.io.Writer lock

Constructor Summary

Constructors
Constructor and Description
`OutputStreamWriter(OutputStream out)` Creates an OutputStreamWriter that uses the default character encoding.
`OutputStreamWriter(OutputStream out, Charset cs)` Creates an OutputStreamWriter that uses the given charset.
`OutputStreamWriter(OutputStream out, CharsetEncoder enc)` Creates an OutputStreamWriter that uses the given charset encoder.
`OutputStreamWriter(OutputStream out, String charsetName)` Creates an OutputStreamWriter that uses the named charset.

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Method Summary

Methods
Modifier and Type	Method and Description
`void`	`close()` Closes the stream, flushing it first.
`void`	`flush()` Flushes the stream.
`String`	`getEncoding()` Returns the name of the character encoding being used by this stream.
`void`	`write(char[] cbuf, int off, int len)` Writes a portion of an array of characters.
`void`	`write(int c)` Writes a single character.
`void`	`write(String str, int off, int len)` Writes a portion of a string.

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Methods inherited from class java.io.Writer append, append, append, write, write

Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - OutputStreamWriter
    public OutputStreamWriter(OutputStream out, String charsetName) throws UnsupportedEncodingException
    
    Creates an OutputStreamWriter that uses the named charset.
    
    Parameters:
    out - An OutputStream
    charsetName - The name of a supported charset
    
    Throws:
    
    UnsupportedEncodingException - If the named encoding is not supported
  - OutputStreamWriter
    public OutputStreamWriter(OutputStream out)
    
    Creates an OutputStreamWriter that uses the default character encoding.
    
    Parameters:
    out - An OutputStream
  - OutputStreamWriter
    public OutputStreamWriter(OutputStream out, Charset cs)
    
    Creates an OutputStreamWriter that uses the given charset.
    
    Parameters:
    out - An OutputStream
    cs - A charset
    Since:
    
    1.4
  - OutputStreamWriter
    public OutputStreamWriter(OutputStream out, CharsetEncoder enc)
    
    Creates an OutputStreamWriter that uses the given charset encoder.
    
    Parameters:
    out - An OutputStream
    enc - A charset encoder
    Since:
    
    1.4
- Method Detail
  - getEncoding
    public String getEncoding()
    
    Returns the name of the character encoding being used by this stream.
    If the encoding has an historical name then that name is returned; otherwise the encoding's canonical name is returned.
    If this instance was created with the OutputStreamWriter(OutputStream, String) constructor then the returned name, being unique for the encoding, may differ from the name passed to the constructor. This method may return null if the stream has been closed.
    
    Returns:
    The historical name of this encoding, or possibly null if the stream has been closed
    See Also:
    Charset
  - write
    public void write(int c) throws IOException
    
    Writes a single character.
    
    Overrides:
    
    write in class Writer
    
    Parameters:
    c - int specifying a character to be written
    
    Throws:
    
    IOException - If an I/O error occurs
  - write
    public void write(char[] cbuf, int off, int len) throws IOException
    
    Writes a portion of an array of characters.
    
    Specified by:
    
    write in class Writer
    
    Parameters:
    cbuf - Buffer of characters
    off - Offset from which to start writing characters
    len - Number of characters to write
    
    Throws:
    
    IOException - If an I/O error occurs
  - write
    public void write(String str, int off, int len) throws IOException
    
    Writes a portion of a string.
    
    Overrides:
    
    write in class Writer
    
    Parameters:
    str - A String
    off - Offset from which to start writing characters
    len - Number of characters to write
    
    Throws:
    
    IOException - If an I/O error occurs
  - flush
    public void flush() throws IOException
    
    Flushes the stream.
    
    Specified by:
    
    flush in interface Flushable
    
    Specified by:
    
    flush in class Writer
    
    Throws:
    
    IOException - If an I/O error occurs
  - close
    public void close() throws IOException
    
    Description copied from class: Writer
    
    Closes the stream, flushing it first. Once the stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in class Writer
    
    Throws:
    
    IOException - If an I/O error occurs

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Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/io/OutputStreamWriter.html

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Referenzen

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Class OutputStreamWriter

Referenzen