public PipedOutputStream() 
{

}

Creates a piped output stream that is not yet connected to a piped input stream. It must be connected to a piped input stream, either by the receiver or the sender, before being used.

Also see:

java.io.PipedInputStream#connect(java.io.PipedOutputStream)
java.io.PipedOutputStream#connect(java.io.PipedInputStream)

 public PipedOutputStream(PipedInputStream snk) throws IOException 
{
        connect(snk);
}

Creates a piped output stream connected to the specified piped input stream. Data bytes written to this stream will then be available as input from snk.

Parameters:

snk - The piped input stream to connect to.

Throws:

IOException - if an I/O error occurs.

exception: IOException - if an I/O error occurs.

 public  void close() throws IOException 
{
        if (sink != null) {
            sink.receivedLast();
        }
}

Closes this piped output stream and releases any system resources associated with this stream. This stream may no longer be used for writing bytes.

 public synchronized  void connect(PipedInputStream snk) throws IOException 
{
        if (snk == null) {
            throw new NullPointerException();
        } else if (sink != null || snk.connected) {
            throw new IOException("Already connected");
        }
        sink = snk;
        snk.in = -1;
        snk.out = 0;
        snk.connected = true;
}

Connects this piped output stream to a receiver. If this object is already connected to some other piped input stream, an IOException is thrown.

If snk is an unconnected piped input stream and src is an unconnected piped output stream, they may be connected by either the call:

src.connect(snk)

or the call:

snk.connect(src)

The two calls have the same effect.

 public synchronized  void flush() throws IOException 
{
        if (sink != null) {
            synchronized (sink) {
                sink.notifyAll();
            }
        }
}

Flushes this output stream and forces any buffered output bytes to be written out. This will notify any readers that bytes are waiting in the pipe.

 public  void write(int b) throws IOException 
{
        if (sink == null) {
            throw new IOException("Pipe not connected");
        }
        sink.receive(b);
}

Writes the specified byte to the piped output stream.

Implements the write method of OutputStream.

 public  void write(byte[] b,
    int off,
    int len) throws IOException 
{
        if (sink == null) {
            throw new IOException("Pipe not connected");
        } else if (b == null) {
            throw new NullPointerException();
        } else if ((off <  0) || (off  > b.length) || (len <  0) ||
                   ((off + len)  > b.length) || ((off + len) <  0)) {
            throw new IndexOutOfBoundsException();
        } else if (len == 0) {
            return;
        }
        sink.receive(b, off, len);
}

Writes len bytes from the specified byte array starting at offset off to this piped output stream. This method blocks until all the bytes are written to the output stream.