BufferedOutputStream

public class BufferedOutputStream extends FilterOutputStream

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.

Field Summary

protected byte[] buf The internal buffer where data is stored.
protected int count The number of valid bytes in the buffer.

Inherited Field Summary

Public Constructor Summary

BufferedOutputStream(OutputStream out)
Creates a new buffered output stream to write data to the specified underlying output stream.
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.

Public Method Summary

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

Inherited Method Summary

Fields

protected byte[] buf

The internal buffer where data is stored.

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.

Public Constructors

public BufferedOutputStream (OutputStream out)

Creates a new buffered output stream to write data to the specified underlying output stream.

Parameters
out the underlying output stream.

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
out the underlying output stream.
size the buffer size.
Throws
IllegalArgumentException if size <= 0.

Public Methods

public synchronized void flush ()

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

Throws
IOException if an I/O error occurs.

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

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
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.

public synchronized void write (int b)

Writes the specified byte to this buffered output stream.

Parameters
b the byte to be written.
Throws
IOException if an I/O error occurs.