GZIPOutputStream
public
class
GZIPOutputStream
extends DeflaterOutputStream
This class implements a stream filter for writing compressed data in
the GZIP file format.
Summary
Fields |
protected
CRC32 |
crc
CRC-32 of uncompressed data.
|
Public methods |
void
|
finish()
Finishes writing compressed data to the output stream without closing
the underlying stream.
|
void
|
write(byte[] buf, int off, int len)
Writes array of bytes to the compressed output stream.
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Inherited methods |
From class
java.util.zip.DeflaterOutputStream
void
|
close()
Writes remaining compressed data to the output stream and closes the
underlying stream.
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void
|
deflate()
Writes next block of compressed data to the output stream.
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void
|
finish()
Finishes writing compressed data to the output stream without closing
the underlying stream.
|
void
|
flush()
Flushes the compressed output stream.
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void
|
write(byte[] b, int off, int len)
Writes an array of bytes to the compressed output stream.
|
void
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write(int b)
Writes a byte to the compressed output stream.
|
|
From class
java.io.FilterOutputStream
void
|
close()
Closes this output stream and releases any system resources
associated with the stream.
|
void
|
flush()
Flushes this output stream and forces any buffered output bytes
to be written out to the stream.
|
void
|
write(byte[] b)
Writes b.length bytes to this output stream.
|
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(int b)
Writes the specified byte to this output stream.
|
|
From class
java.io.OutputStream
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.
|
static
OutputStream
|
nullOutputStream()
Returns a new OutputStream which discards all bytes.
|
void
|
write(byte[] b)
Writes b.length bytes from the specified byte array
to this output stream.
|
void
|
write(byte[] b, int off, int len)
Writes len bytes from the specified byte array
starting at offset off to this output stream.
|
abstract
void
|
write(int b)
Writes the specified byte to this output stream.
|
|
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.
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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(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
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.
|
|
From interface
java.lang.AutoCloseable
abstract
void
|
close()
Closes this resource, relinquishing any underlying resources.
|
|
Fields
crc
protected CRC32 crc
CRC-32 of uncompressed data.
Public constructors
GZIPOutputStream
public GZIPOutputStream (OutputStream out)
Creates a new output stream with a default buffer size.
The new output stream instance is created as if by invoking
the 2-argument constructor GZIPOutputStream(out, false).
Parameters |
out |
OutputStream : the output stream |
GZIPOutputStream
public GZIPOutputStream (OutputStream out,
boolean syncFlush)
Creates a new output stream with a default buffer size and
the specified flush mode.
Parameters |
out |
OutputStream : the output stream |
syncFlush |
boolean : if true invocation of the inherited
flush() method of
this instance flushes the compressor with flush mode
Deflater.SYNC_FLUSH before flushing the output
stream, otherwise only flushes the output stream |
GZIPOutputStream
public GZIPOutputStream (OutputStream out,
int size)
Creates a new output stream with the specified buffer size.
The new output stream instance is created as if by invoking
the 3-argument constructor GZIPOutputStream(out, size, false).
Android-note: Android limits the number of UnbufferedIO operations that can be performed, so
consider using buffered inputs with this class. More information can be found in the
UnbufferedIO and
StrictMode
documentation.
Parameters |
out |
OutputStream : the output stream |
size |
int : the output buffer size |
GZIPOutputStream
public GZIPOutputStream (OutputStream out,
int size,
boolean syncFlush)
Creates a new output stream with the specified buffer size and
flush mode.
Parameters |
out |
OutputStream : the output stream |
size |
int : the output buffer size |
syncFlush |
boolean : if true invocation of the inherited
flush() method of
this instance flushes the compressor with flush mode
Deflater.SYNC_FLUSH before flushing the output
stream, otherwise only flushes the output stream |
Public methods
finish
public void finish ()
Finishes writing compressed data to the output stream without closing
the underlying stream. Use this method when applying multiple filters
in succession to the same output stream.
write
public void write (byte[] buf,
int off,
int len)
Writes array of bytes to the compressed output stream. This method
will block until all the bytes are written.
Parameters |
buf |
byte : the data to be written |
off |
int : the start offset of the data |
len |
int : the length of the data |
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Last updated 2025-02-10 UTC.
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