java.io
Class ByteArrayInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--java.io.ByteArrayInputStream

public class ByteArrayInputStream

extends InputStream

This class implements a buffer that can be used as an InputStream.

Field Summary

protected byte[]	buf The buffer where data is stored.
protected int	count The number of characters to use in the buffer.
protected int	pos The current position in the buffer.

Constructor Summary

ByteArrayInputStream(byte[] buf)
Creates an ByteArrayInputStream from the specified array of bytes.

ByteArrayInputStream(byte[] buf, int offset, int length)
Creates an ByteArrayInputStream from the specified array of bytes.

Method Summary

int	available() Returns the number of available bytes in the buffer.
int	read() Reads a byte of data.
int	read(byte[] b, int off, int len) Reads into an array of bytes.
void	reset() Resets the buffer to the beginning.
long	skip(long n) Skips n bytes of input.

Methods inherited from class java.io.InputStream

close, mark, markSupported, read

Methods inherited from class java.lang.Object

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

Field Detail

buf

protected byte[] buf

The buffer where data is stored.

pos

protected int pos

The current position in the buffer.

count

protected int count

The number of characters to use in the buffer.

Constructor Detail

ByteArrayInputStream

public ByteArrayInputStream(byte[] buf)

Creates an ByteArrayInputStream from the specified array of bytes.

Parameters:

buf - the input buffer (not copied)

ByteArrayInputStream

public ByteArrayInputStream(byte[] buf,
                            int offset,
                            int length)

Creates an ByteArrayInputStream from the specified array of bytes.

Parameters:

buf - the input buffer (not copied)

offset - the offset of the first byte to read

length - the number of bytes to read

Method Detail

read

public int read()

Reads a byte of data.

Specified by:

read in class InputStream

Returns:

the byte read, or -1 if the end of the stream is reached.

read

public int read(byte[] b,
                int off,
                int len)

Reads into an array of bytes.

Overrides:

read in class InputStream

Parameters:

b - the buffer into which the data is read

off - the start offset of the data

len - the maximum number of bytes read

Returns:

the actual number of bytes read; -1 is returned when the end of the stream is reached.

skip

public long skip(long n)

Skips n bytes of input.

Overrides:

skip in class InputStream

Parameters:

n - the number of bytes to be skipped

Returns:

the actual number of bytes skipped.

available

public int available()

Returns the number of available bytes in the buffer.

Overrides:

available in class InputStream

Returns:

the number of available bytes.

reset

public void reset()

Resets the buffer to the beginning.

Overrides:

reset in class InputStream