Class: java.io.BufferedOutputStream

The class implements a buffered output stream. By setting up such an output stream, an application can write bytes to the underlying output stream without necessarily causing a call to the underlying system for each byte written.
Authors:
@author Arthur van Hoff
Since:
@since JDK1.0

Inheritance

Superclass tree: Implements:

Methods

  • BufferedOutputStreamtop

    public BufferedOutputStream(OutputStream out)
    Creates a new buffered output stream to write data to the specified underlying output stream.
    Parameters:
    @param out the underlying output stream.
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  • BufferedOutputStreamtop

    public BufferedOutputStream(OutputStream out, int size)
    Creates a new buffered output stream to write data to the specified underlying output stream with the specified buffer size.
    Parameters:
    @param out the underlying output stream.
    @param size the buffer size.
    Exceptions:
    @exception IllegalArgumentException if size <= 0.
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  • flushtop

    public synchronized void flush() throws IOException
    Flushes this buffered output stream. This forces any buffered output bytes to be written out to the underlying output stream.
    Exceptions:
    @exception IOException if an I/O error occurs.
    See:
    @see java.io.FilterOutputStream.out
    Specified by:
    flush from Flushable
    Override hierarchy:
    flush from FilterOutputStream
    flush from OutputStream
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  • writetop

    public synchronized void write(int b) throws IOException
    Writes the specified byte to this buffered output stream.
    Parameters:
    @param b the byte to be written.
    Exceptions:
    @exception IOException if an I/O error occurs.
    Override hierarchy:
    write from FilterOutputStream
    write from OutputStream
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  • writetop

    public synchronized void write(byte[] b, int off, int len) throws IOException
    Writes len bytes from the specified byte array starting at offset off to this buffered output stream.

    Ordinarily this method stores bytes from the given array into this stream's buffer, flushing the buffer to the underlying output stream as needed. If the requested length is at least as large as this stream's buffer, however, then this method will flush the buffer and write the bytes directly to the underlying output stream. Thus redundant BufferedOutputStreams will not copy data unnecessarily.

    Parameters:
    @param b the data.
    @param off the start offset in the data.
    @param len the number of bytes to write.
    Exceptions:
    @exception IOException if an I/O error occurs.
    Override hierarchy:
    write from FilterOutputStream
    write from OutputStream
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Fields

  • buf

    protected byte[] buf
    The internal buffer where data is stored.

  • count

    protected int count
    The number of valid bytes in the buffer. This value is always in the range 0 through buf.length; elements buf[0] through buf[count-1] contain valid byte data.