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| java.lang.Object
 java.nio.channels.Channels
| Channels | | final public class Channels (Code) | | Utility methods for channels and streams.
This class defines static methods that support the interoperation of the
stream classes of the
java.io package with the channel
classes of this package.
author:
Mark Reinhold
author:
Mike McCloskey
author:
JSR-51 Expert Group
version:
1.31, 07/05/05
since:
1.4 |
| Method Summary | |
| public static ReadableByteChannel | newChannel(InputStream in)
Constructs a channel that reads bytes from the given stream.
The resulting channel will not be buffered; it will simply redirect
its I/O operations to the given stream. | | public static WritableByteChannel | newChannel(OutputStream out)
Constructs a channel that writes bytes to the given stream.
The resulting channel will not be buffered; it will simply redirect
its I/O operations to the given stream. | | public static InputStream | newInputStream(ReadableByteChannel ch)
Constructs a stream that reads bytes from the given channel.
The read methods of the resulting stream will throw an
IllegalBlockingModeException if invoked while the underlying
channel is in non-blocking mode. | | public static OutputStream | newOutputStream(WritableByteChannel ch)
Constructs a stream that writes bytes to the given channel.
The write methods of the resulting stream will throw an
IllegalBlockingModeException if invoked while the underlying
channel is in non-blocking mode. | | public static Reader | newReader(ReadableByteChannel ch, CharsetDecoder dec, int minBufferCap)
Constructs a reader that decodes bytes from the given channel using the
given decoder.
The resulting stream will contain an internal input buffer of at
least minBufferCap bytes. | | public static Reader | newReader(ReadableByteChannel ch, String csName)
Constructs a reader that decodes bytes from the given channel according
to the named charset. | | public static Writer | newWriter(WritableByteChannel ch, CharsetEncoder enc, int minBufferCap)
Constructs a writer that encodes characters using the given encoder and
writes the resulting bytes to the given channel.
The resulting stream will contain an internal output buffer of at
least minBufferCap bytes. | | public static Writer | newWriter(WritableByteChannel ch, String csName)
Constructs a writer that encodes characters according to the named
charset and writes the resulting bytes to the given channel. |
| newChannel | | public static ReadableByteChannel newChannel(InputStream in)(Code) | | Constructs a channel that reads bytes from the given stream.
The resulting channel will not be buffered; it will simply redirect
its I/O operations to the given stream. Closing the channel will in
turn cause the stream to be closed.
Parameters:
in - The stream from which bytes are to be read A new readable byte channel |
| newChannel | | public static WritableByteChannel newChannel(OutputStream out)(Code) | | Constructs a channel that writes bytes to the given stream.
The resulting channel will not be buffered; it will simply redirect
its I/O operations to the given stream. Closing the channel will in
turn cause the stream to be closed.
Parameters:
out - The stream to which bytes are to be written A new writable byte channel |
| newInputStream | | public static InputStream newInputStream(ReadableByteChannel ch)(Code) | | Constructs a stream that reads bytes from the given channel.
The read methods of the resulting stream will throw an
IllegalBlockingModeException if invoked while the underlying
channel is in non-blocking mode. The stream will not be buffered, and
it will not support the
InputStream.mark mark or
InputStream.reset reset methods. The stream will be safe for access by
multiple concurrent threads. Closing the stream will in turn cause the
channel to be closed.
Parameters:
ch - The channel from which bytes will be read A new input stream |
| newOutputStream | | public static OutputStream newOutputStream(WritableByteChannel ch)(Code) | | Constructs a stream that writes bytes to the given channel.
The write methods of the resulting stream will throw an
IllegalBlockingModeException if invoked while the underlying
channel is in non-blocking mode. The stream will not be buffered. The
stream will be safe for access by multiple concurrent threads. Closing
the stream will in turn cause the channel to be closed.
Parameters:
ch - The channel to which bytes will be written A new output stream |
| newReader | | public static Reader newReader(ReadableByteChannel ch, CharsetDecoder dec, int minBufferCap)(Code) | | Constructs a reader that decodes bytes from the given channel using the
given decoder.
The resulting stream will contain an internal input buffer of at
least minBufferCap bytes. The stream's read methods
will, as needed, fill the buffer by reading bytes from the underlying
channel; if the channel is in non-blocking mode when bytes are to be
read then an
IllegalBlockingModeException will be thrown. The
resulting stream will not otherwise be buffered, and it will not support
the
Reader.mark mark or
Reader.reset reset methods.
Closing the stream will in turn cause the channel to be closed.
Parameters:
ch - The channel from which bytes will be read
Parameters:
dec - The charset decoder to be used
Parameters:
minBufferCap - The minimum capacity of the internal byte buffer,or -1 if an implementation-dependentdefault capacity is to be used A new reader |
| newReader | | public static Reader newReader(ReadableByteChannel ch, String csName)(Code) | | Constructs a reader that decodes bytes from the given channel according
to the named charset.
An invocation of this method of the form
Channels.newReader(ch, csname)
behaves in exactly the same way as the expression
Channels.newReader(ch,
Charset.forName(csName)
.newDecoder(),
-1);
Parameters:
ch - The channel from which bytes will be read
Parameters:
csName - The name of the charset to be used A new reader
throws:
UnsupportedCharsetException - If no support for the named charset is availablein this instance of the Java virtual machine |
| newWriter | | public static Writer newWriter(WritableByteChannel ch, CharsetEncoder enc, int minBufferCap)(Code) | | Constructs a writer that encodes characters using the given encoder and
writes the resulting bytes to the given channel.
The resulting stream will contain an internal output buffer of at
least minBufferCap bytes. The stream's write methods
will, as needed, flush the buffer by writing bytes to the underlying
channel; if the channel is in non-blocking mode when bytes are to be
written then an
IllegalBlockingModeException will be thrown.
The resulting stream will not otherwise be buffered. Closing the stream
will in turn cause the channel to be closed.
Parameters:
ch - The channel to which bytes will be written
Parameters:
enc - The charset encoder to be used
Parameters:
minBufferCap - The minimum capacity of the internal byte buffer,or -1 if an implementation-dependentdefault capacity is to be used A new writer |
| newWriter | | public static Writer newWriter(WritableByteChannel ch, String csName)(Code) | | Constructs a writer that encodes characters according to the named
charset and writes the resulting bytes to the given channel.
An invocation of this method of the form
Channels.newWriter(ch, csname)
behaves in exactly the same way as the expression
Channels.newWriter(ch,
Charset.forName(csName)
.newEncoder(),
-1);
Parameters:
ch - The channel to which bytes will be written
Parameters:
csName - The name of the charset to be used A new writer
throws:
UnsupportedCharsetException - If no support for the named charset is availablein this instance of the Java virtual machine |
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