Known Direct Subclasses
ByteArrayOutputStream |
This class implements an output stream in which the data is
written into a byte array. |
FileOutputStream |
A file output stream is an output stream for writing data to a
File or to a FileDescriptor . |
FilterOutputStream |
This class is the superclass of all classes that filter output
streams. |
LogOutputStream |
|
ObjectOutputStream |
An ObjectOutputStream writes primitive data types and graphs of Java objects
to an OutputStream. |
PipedOutputStream |
A piped output stream can be connected to a piped input stream
to create a communications pipe. |
RIFFWriter |
Resource Interchange File Format (RIFF) stream encoder. |
|
Known Indirect Subclasses
BufferedOutputStream,
CheckedOutputStream,
ChunkedOutputStream,
CipherOutputStream,
DataOutputStream,
DeflaterOutputStream,
DerOutputStream,
DigestOutputStream,
FtpURLConnection.FtpOutputStream,
GZIPOutputStream,
InflaterOutputStream,
JarOutputStream,
LogStream,
MarshalOutputStream,
PosterOutputStream,
PrintStream,
TelnetOutputStream,
ZipOutputStream
BufferedOutputStream |
The class implements a buffered output stream. |
CheckedOutputStream |
An output stream that also maintains a checksum of the data being
written. |
ChunkedOutputStream |
OutputStream that sends the output to the underlying stream using chunked
encoding as specified in RFC 2068. |
CipherOutputStream |
A CipherOutputStream is composed of an OutputStream and a Cipher so
that write() methods first process the data before writing them out
to the underlying OutputStream. |
DataOutputStream |
A data output stream lets an application write primitive Java data
types to an output stream in a portable way. |
DeflaterOutputStream |
This class implements an output stream filter for compressing data in
the "deflate" compression format. |
DerOutputStream |
Output stream marshaling DER-encoded data. |
DigestOutputStream |
A transparent stream that updates the associated message digest using
the bits going through the stream. |
FtpURLConnection.FtpOutputStream |
For FTP URLs we need to have a special OutputStream because we
need to close 2 sockets after we're done with it :
- The Data socket (for the file). |
GZIPOutputStream |
This class implements a stream filter for writing compressed data in
the GZIP file format. |
InflaterOutputStream |
Implements an output stream filter for uncompressing data stored in the
"deflate" compression format. |
JarOutputStream |
The JarOutputStream class is used to write the contents
of a JAR file to any output stream. |
LogStream |
This class is deprecated.
no replacement
|
MarshalOutputStream |
A MarshalOutputStream extends ObjectOutputStream to add functions
specific to marshaling of remote object references. |
PosterOutputStream |
Instances of this class are returned to applications for the purpose of
sending user data for a HTTP POST or PUT request. |
PrintStream |
A PrintStream adds functionality to another output stream,
namely the ability to print representations of various data values
conveniently. |
TelnetOutputStream |
This class provides input and output streams for telnet clients. |
ZipOutputStream |
This class implements an output stream filter for writing files in the
ZIP file format. |
|
Class Overview
This abstract class is the superclass of all classes representing
an output stream of bytes. An output stream accepts output bytes
and sends them to some sink.
Applications that need to define a subclass of
OutputStream
must always provide at least a method
that writes one byte of output.
Summary
Public Methods |
void
|
close()
Closes this output stream and releases any system resources
associated with this stream.
|
void
|
flush()
Flushes this output stream and forces any buffered output bytes
to be written out.
|
void
|
write(byte[] b, int off, int len)
Writes len bytes from the specified byte array
starting at offset off to this output stream.
|
void
|
write(byte[] b)
Writes b.length bytes from the specified byte array
to this output stream.
|
abstract
void
|
write(int b)
Writes the specified byte to this output stream.
|
[Expand]
Inherited Methods |
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object .
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait()
Causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object.
|
final
void
|
wait(long timeout, int nanos)
Causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object, or
some other thread interrupts the current thread, or a certain
amount of real time has elapsed.
|
final
void
|
wait(long timeout)
Causes the current thread to wait until either another thread invokes the
notify() method or the
notifyAll() method for this object, or a
specified amount of time has elapsed.
|
|
From interface
java.io.Closeable
abstract
void
|
close()
Closes this stream and releases any system resources associated
with it.
|
|
From interface
java.io.Flushable
abstract
void
|
flush()
Flushes this stream by writing any buffered output to the underlying
stream.
|
|
Public Constructors
Public Methods
public
void
close
()
Closes this output stream and releases any system resources
associated with this stream. The general contract of close
is that it closes the output stream. A closed stream cannot perform
output operations and cannot be reopened.
The close
method of OutputStream
does nothing.
public
void
flush
()
Flushes this output stream and forces any buffered output bytes
to be written out. The general contract of flush
is
that calling it is an indication that, if any bytes previously
written have been buffered by the implementation of the output
stream, such bytes should immediately be written to their
intended destination.
If the intended destination of this stream is an abstraction provided by
the underlying operating system, for example a file, then flushing the
stream guarantees only that bytes previously written to the stream are
passed to the operating system for writing; it does not guarantee that
they are actually written to a physical device such as a disk drive.
The flush
method of OutputStream
does nothing.
public
void
write
(byte[] b, int off, int len)
Writes len
bytes from the specified byte array
starting at offset off
to this output stream.
The general contract for write(b, off, len)
is that
some of the bytes in the array b
are written to the
output stream in order; element b[off]
is the first
byte written and b[off+len-1]
is the last byte written
by this operation.
The write
method of OutputStream
calls
the write method of one argument on each of the bytes to be
written out. Subclasses are encouraged to override this method and
provide a more efficient implementation.
If b
is null
, a
NullPointerException
is thrown.
If off
is negative, or len
is negative, or
off+len
is greater than the length of the array
b
, then an IndexOutOfBoundsException is thrown.
Parameters
b
| the data. |
off
| the start offset in the data. |
len
| the number of bytes to write. |
Throws
IOException
| if an I/O error occurs. In particular,
an IOException is thrown if the output
stream is closed.
|
public
void
write
(byte[] b)
Writes b.length
bytes from the specified byte array
to this output stream. The general contract for write(b)
is that it should have exactly the same effect as the call
write(b, 0, b.length)
.
public
abstract
void
write
(int b)
Writes the specified byte to this output stream. The general
contract for write
is that one byte is written
to the output stream. The byte to be written is the eight
low-order bits of the argument b
. The 24
high-order bits of b
are ignored.
Subclasses of OutputStream
must provide an
implementation for this method.
Throws
IOException
| if an I/O error occurs. In particular,
an IOException may be thrown if the
output stream has been closed.
|