java.util.zip
Class GZIPOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          java.util.zip.DeflaterOutputStream
              java.util.zip.GZIPOutputStream

All Implemented Interfaces:

Closeable, Flushable

public class GZIPOutputStream
extends DeflaterOutputStream

The GZIPOutputStream class is used to write data to a stream in the GZIP storage format.

Field Summary

protected CRC32

crc

Fields inherited from class java.util.zip.DeflaterOutputStream

buf, BUF_SIZE, def, done

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

GZIPOutputStream(OutputStream os)
Construct a new GZIPOutputStream to write data in GZIP format to the underlying stream.

GZIPOutputStream(OutputStream os, int size)
Construct a new GZIPOutputStream to write data in GZIP format to the underlying stream.

Method Summary

void	finish() Indicates to the stream that all data has been written out, and any GZIP terminal data can now be output.
void	write(byte[] buffer, int off, int nbytes) Write up to nbytes of data from buf, starting at offset off, to the underlying stream in GZIP format.

Methods inherited from class java.util.zip.DeflaterOutputStream

close, deflate, write

Methods inherited from class java.io.FilterOutputStream

flush, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

crc

protected CRC32 crc

Constructor Detail

GZIPOutputStream

public GZIPOutputStream(OutputStream os)
                 throws IOException

Construct a new GZIPOutputStream to write data in GZIP format to the underlying stream.

Parameters:

os - OutputStream to write to

Throws:

IOException

GZIPOutputStream

public GZIPOutputStream(OutputStream os,
                        int size)
                 throws IOException

Construct a new GZIPOutputStream to write data in GZIP format to the underlying stream. Set the internal compression buffer to sise size.

Parameters:

os - OutputStream to write to

size - Internal buffer size

Throws:

IOException

Method Detail

finish

public void finish()
            throws IOException

Indicates to the stream that all data has been written out, and any GZIP terminal data can now be output.

Overrides:

finish in class DeflaterOutputStream

Throws:

IOException - If an error occurs.

write

public void write(byte[] buffer,
                  int off,
                  int nbytes)
           throws IOException

Write up to nbytes of data from buf, starting at offset off, to the underlying stream in GZIP format.

Overrides:

write in class DeflaterOutputStream

Parameters:

buffer - Buffer of data to compress

off - offset in buffer to extract data from

nbytes - Number of bytes of data to compress and write

Throws:

IOException - If an error occurs attempting to write to this FilterOutputStream.