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BufferedOutputStream

public class BufferedOutputStream
extends FilterOutputStream

java.lang.Object
   ↳ java.io.OutputStream
     ↳ java.io.FilterOutputStream
       ↳ 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.

Summary

Fields

protected byte[] buf

The internal buffer where data is stored.

protected int count

The number of valid bytes in the buffer.

Inherited fields

Public constructors

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 methods

void flush()

Flushes this buffered output stream.

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.

void write(int b)

Writes the specified byte to this buffered output stream.

Inherited methods

Fields

buf

added in API level 1
protected byte[] buf

The internal buffer where data is stored.

count

added in API level 1
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

BufferedOutputStream

added in API level 1
public BufferedOutputStream (OutputStream out)

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

Parameters
out OutputStream: the underlying output stream.

BufferedOutputStream

added in API level 1
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 OutputStream: the underlying output stream.

size int: the buffer size.

Throws
IllegalArgumentException if size <= 0.

Public methods

flush

added in API level 1
public 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.

write

added in API level 1
public 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 byte: the data.

off int: the start offset in the data.

len int: the number of bytes to write.

Throws
IOException if an I/O error occurs.

write

added in API level 1
public void write (int b)

Writes the specified byte to this buffered output stream.

Parameters
b int: the byte to be written.

Throws
IOException if an I/O error occurs.