com.jmobilecore.comm
Class BufferedOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.ByteArrayOutputStream
          com.jmobilecore.comm.BufferedOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class BufferedOutputStream
extends java.io.ByteArrayOutputStream

The class is J2ME port of Sun's BufferedOutputStream which 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.

Author:

Greg Gridin

Field Summary

protected static int	DEFAULT_BUFFER_SIZE
protected java.io.OutputStream	out The output stream.

Fields inherited from class java.io.ByteArrayOutputStream

buf, count

Constructor Summary

BufferedOutputStream(java.io.OutputStream out)
Creates a new buffered output stream to write data to the specified underlying output stream with a default 512-byte buffer size.

BufferedOutputStream(java.io.OutputStream out, int size)
Creates a new buffered output stream to write data to the specified underlying output stream with the specified buffer size.

Method Summary

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.

Methods inherited from class java.io.ByteArrayOutputStream

close, reset, size, toByteArray, toString, toString, toString, writeTo

Methods inherited from class java.io.OutputStream

write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_BUFFER_SIZE

protected static int DEFAULT_BUFFER_SIZE

out

protected java.io.OutputStream out

The output stream.

Constructor Detail

BufferedOutputStream

public BufferedOutputStream(java.io.OutputStream out)

Creates a new buffered output stream to write data to the specified underlying output stream with a default 512-byte buffer size.

Parameters:

out - the underlying output stream.

BufferedOutputStream

public BufferedOutputStream(java.io.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:

java.lang.IllegalArgumentException - if size <= 0.

Method Detail

flush

public void flush()
           throws java.io.IOException

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

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

Throws:

java.io.IOException - if an I/O error occurs.

write

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.

Overrides:

write in class java.io.ByteArrayOutputStream

Parameters:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

write

public void write(int b)

Writes the specified byte to this buffered output stream.

Overrides:

write in class java.io.ByteArrayOutputStream

Parameters:

b - the byte to be written.