Java compact1, compact2, compact3 java.io Class FilterOutputStream（JDK8）

Field Detail

• out

  protected OutputStream out

  The underlying output stream to be filtered.

Constructor Detail

• FilterOutputStream

  public FilterOutputStream(OutputStream out)

  Creates an output stream filter built on top of the specified underlying output stream.

  Parameters:

  out - the underlying output stream to be assigned to the field this.out for later use, or null if this instance is to be created without an underlying stream.

Method Detail

• write

  public void write(int b)
             throws IOException

  Writes the specified byte to this output stream.

  The write method of FilterOutputStream calls the write method of its underlying output stream, that is, it performs out.write(b).

  Implements the abstract write method of OutputStream.

  Specified by:

  write in class OutputStream

  Parameters:

  b - the byte.

  Throws:

  IOException - if an I/O error occurs.

• write

  public void write(byte[] b)
             throws IOException

  Writes b.length bytes to this output stream.

  The write method of FilterOutputStream calls its write method of three arguments with the arguments b, 0, and b.length.

  Note that this method does not call the one-argument write method of its underlying stream with the single argument b.

  Overrides:

  write in class OutputStream

  Parameters:

  b - the data to be written.

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  write(byte[], int, int)

• write

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

  Writes len bytes from the specified byte array starting at offset off to this output stream.

  The write method of FilterOutputStream calls the write method of one argument on each byte to output.

  Note that this method does not call the write method of its underlying input stream with the same arguments. Subclasses of FilterOutputStream should provide a more efficient implementation of this method.

  Overrides:

  write in class OutputStream

  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.

  See Also:

  write(int)

• flush

  public void flush()
             throws IOException

  Flushes this output stream and forces any buffered output bytes to be written out to the stream.

  The flush method of FilterOutputStream calls the flush method of its underlying output stream.

  Specified by:

  flush in interface Flushable

  Overrides:

  flush in class OutputStream

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  out

• close

  public void close()
             throws IOException

  Closes this output stream and releases any system resources associated with the stream.

  The close method of FilterOutputStream calls its flush method, and then calls the close method of its underlying output stream.

  Specified by:

  close in interface Closeable

  Specified by:

  close in interface AutoCloseable

  Overrides:

  close in class OutputStream

  Throws:

  IOException - if an I/O error occurs.

  See Also:

  flush(), out