Java compact1, compact2, compact3 java.util.zip Class DeflaterOutputStream（JDK8）

Field Detail

• def

  protected Deflater def

  Compressor for this stream.

• buf

  protected byte[] buf

  Output buffer for writing compressed data.

Constructor Detail

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out,
                              Deflater def,
                              int size,
                              boolean syncFlush)

  Creates a new output stream with the specified compressor, buffer size and flush mode.

  Parameters:

  out - the output stream

  def - the compressor ("deflater")

  size - the output buffer size

  syncFlush - if true the 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

  Throws:

  IllegalArgumentException - if size <= 0

  Since:

  1.7

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out,
                              Deflater def,
                              int size)

  Creates a new output stream with the specified compressor and buffer size.

  The new output stream instance is created as if by invoking the 4-argument constructor DeflaterOutputStream(out, def, size, false).

  Parameters:

  out - the output stream

  def - the compressor ("deflater")

  size - the output buffer size

  Throws:

  IllegalArgumentException - if size <= 0

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out,
                              Deflater def,
                              boolean syncFlush)

  Creates a new output stream with the specified compressor, flush mode and a default buffer size.

  Parameters:

  out - the output stream

  def - the compressor ("deflater")

  syncFlush - if true the 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

  Since:

  1.7

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out,
                              Deflater def)

  Creates a new output stream with the specified compressor and a default buffer size.

  The new output stream instance is created as if by invoking the 3-argument constructor DeflaterOutputStream(out, def, false).

  Parameters:

  out - the output stream

  def - the compressor ("deflater")

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out,
                              boolean syncFlush)

  Creates a new output stream with a default compressor, a default buffer size and the specified flush mode.

  Parameters:

  out - the output stream

  syncFlush - if true the 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

  Since:

  1.7

• DeflaterOutputStream

  public DeflaterOutputStream(OutputStream out)

  Creates a new output stream with a default compressor and buffer size.

  The new output stream instance is created as if by invoking the 2-argument constructor DeflaterOutputStream(out, false).

  Parameters:

  out - the output stream

Method Detail

• write

  public void write(int b)
             throws IOException

  Writes a byte to the compressed output stream. This method will block until the byte can be written.

  Overrides:

  write in class FilterOutputStream

  Parameters:

  b - the byte to be written

  Throws:

  IOException - if an I/O error has occurred

• write

  public void write(byte[] b,
                    int off,
                    int len)
             throws IOException

  Writes an array of bytes to the compressed output stream. This method will block until all the bytes are written.

  Overrides:

  write in class FilterOutputStream

  Parameters:

  b - the data to be written

  off - the start offset of the data

  len - the length of the data

  Throws:

  IOException - if an I/O error has occurred

  See Also:

  FilterOutputStream.write(int)

• finish

  public void finish()
              throws IOException

  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.

  Throws:

  IOException - if an I/O error has occurred

• close

  public void close()
             throws IOException

  Writes remaining compressed data to the output stream and closes the underlying stream.

  Specified by:

  close in interface Closeable

  Specified by:

  close in interface AutoCloseable

  Overrides:

  close in class FilterOutputStream

  Throws:

  IOException - if an I/O error has occurred

  See Also:

  FilterOutputStream.flush(), FilterOutputStream.out

• deflate

  protected void deflate()
                  throws IOException

  Writes next block of compressed data to the output stream.

  Throws:

  IOException - if an I/O error has occurred

• flush

  public void flush()
             throws IOException

  Flushes the compressed output stream. If syncFlush is true when this compressed output stream is constructed, this method first flushes the underlying compressor with the flush mode Deflater.SYNC_FLUSH to force all pending data to be flushed out to the output stream and then flushes the output stream. Otherwise this method only flushes the output stream without flushing the compressor.

  Specified by:

  flush in interface Flushable

  Overrides:

  flush in class FilterOutputStream

  Throws:

  IOException - if an I/O error has occurred

  Since:

  1.7

  See Also:

  FilterOutputStream.out