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public  class  java.io.FilterOutputStream
    extends  java.io.OutputStream  (I-§2.15)
{

        // Fields	 
    protected OutputStream out;	§2.12.1

        // Constructors
    public FilterOutputStream(OutputStream  out);	§2.12.2

        // Methods
    public void close();	§2.12.3
    public void flush();	§2.12.4
    public void write(byte  b[]);	§2.12.5
    public void write(byte  b[], int  off, int  len);	§2.12.6
    public void write(int  b);	§2.12.7
}

The class FilterOutputStream itself simply overrides all methods of OutputStream with versions that pass all requests to the underlying output stream. Subclasses of FilterOutputStream may further override some of these methods as well as provide additional methods and fields.

The underlying output stream.

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

Parameters:

out - the underlying output stream

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

The close method of FilterOutputStream calls its flush method (I-§2.12.4), and then calls the close method of its underlying output stream (I-§2.12.1).

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

close in class OutputStream (I-§2.15.2).

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 it underlying output stream (I-§2.12.1).

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

flush in class OutputStream (I-§2.15.3).

Writes b.length bytes to this output stream.

The write method of FilterOutputStream calls its write method of three arguments (I-§2.12.6) 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.

Parameters:

b - the data to be written

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

write in class OutputStream (I-§2.15.4).

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 (I-§2.12.7) 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.

Parameters:

b - the data

off - the start offset in the data

len - the number of bytes to write

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

write in class OutputStream (I-§2.15.5).

Writes the specified byte to this output stream.

The write method of FilterOutputStream calls the write method of its underlying output stream(I-§2.12.1).

Parameters:

b - the byte

Throws

IOException (I-§2.29)

If an I/O error occurs.

Overrides:

write in class OutputStream (I-§2.15.6).

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