BufferedInputStream JDK 1.6)

Methods

publicsynchronized int available () throws IOException [Overrides FilterInputStream]

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.

public void close () throws IOException [Overrides FilterInputStream]

Closes this input stream and releases any system resources associated with the stream.

publicsynchronized void mark (int readlimit) [Overrides FilterInputStream]

See the general contract of the mark method of InputStream.

See the general contract of the mark
method of InputStream.
Parameters:
- readlimit - the maximum limit of bytes that can be read before the mark position becomes invalid.
See Also: BufferedInputStream.reset(),

public boolean markSupported () [Overrides FilterInputStream]

Tests if this input stream supports the mark and reset methods.

Tests if this input stream supports the mark
and reset methods. The markSupported
method of BufferedInputStream returns
true.
Returns: a boolean indicating if this stream type supports the mark and reset methods.
See Also: InputStream.mark(int), InputStream.reset(),

publicsynchronized int read () throws IOException [Overrides FilterInputStream] [Specified in InputStream]

See the general contract of the read method of InputStream.

See
the general contract of the read
method of InputStream.
Returns: the next byte of data, or -1 if the end of the stream is reached.
Throws:
- IOException - if this input stream has been closed by invoking its {@link #close()} method, or an I/O error occurs.
See Also: FilterInputStream.in,

public int read (byte[] b) throws IOException [Inherited From FilterInputStream]

Reads up to byte.length bytes of data from this input stream into an array of bytes.

Reads up to byte.length bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

This method simply performs the call read(b, 0, b.length) and returns the result. It is important that it does not do in.read(b) instead; certain subclasses of FilterInputStream depend on the implementation strategy actually used.
Returns: the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.
Parameters:
- b - the buffer into which the data is read.
Throws:
- IOException - if an I/O error occurs.
See Also: FilterInputStream.read(byte[], int, int),

publicsynchronized int read (byte[] b, int off, int len) throws IOException [Overrides FilterInputStream]

Reads bytes from this byte-input stream into the specified byte array, starting at the given offset.

This method implements the general contract of the corresponding read method of the InputStream class. As an additional convenience, it attempts to read as many bytes as possible by repeatedly invoking the read method of the underlying stream. This iterated read continues until one of the following conditions becomes true:

The specified number of bytes have been read,
The read method of the underlying stream returns -1, indicating end-of-file, or
The available method of the underlying stream returns zero, indicating that further input requests would block.

If the first read on the underlying stream returns -1 to indicate end-of-file then this method returns -1. Otherwise this method returns the number of bytes actually read.

Subclasses of this class are encouraged, but not required, to attempt to read as many bytes as possible in the same fashion.
Returns: the number of bytes read, or -1 if the end of the stream has been reached.
Parameters:
- b - destination buffer.
- off - offset at which to start storing bytes.
- len - maximum number of bytes to read.
Throws:
- IOException - if this input stream has been closed by invoking its {@link #close()} method, or an I/O error occurs.

publicsynchronized void reset () throws IOException [Overrides FilterInputStream]

See the general contract of the reset method of InputStream.

If markpos is -1 (no mark has been set or the mark has been invalidated), an IOException is thrown. Otherwise, pos is set equal to markpos.
Throws:
- IOException - if this stream has not been marked or, if the mark has been invalidated, or the stream has been closed by invoking its {@link #close()} method, or an I/O error occurs.
See Also: BufferedInputStream.mark(int),

publicsynchronized long skip (long n) throws IOException [Overrides FilterInputStream]

See the general contract of the skip method of InputStream.

See the general contract of the skip
method of InputStream.
Throws:
- IOException - if the stream does not support seek, or if this input stream has been closed by invoking its {@link #close()} method, or an I/O error occurs.

Fields

Hide/Show inherited fields

protectedvolatile byte buf

The internal buffer array where the data is stored.

protected int count

The index one greater than the index of the last valid byte in the buffer.

The index one greater than the index of the last valid byte in
the buffer.
This value is always
in the range 0 through buf.length;
elements buf[0] through

buf[count-1]

contain buffered input data obtained
from the underlying input stream.

protectedvolatile InputStream in [Inherited From FilterInputStream]

The input stream to be filtered.

protected int marklimit

The maximum read ahead allowed after a call to the mark method before subsequent calls to the reset method fail.

The maximum read ahead allowed after a call to the
mark method before subsequent calls to the
reset method fail.
Whenever the difference between pos
and markpos exceeds marklimit,
then the mark may be dropped by setting
markpos to -1.
See Also: BufferedInputStream.mark(int), BufferedInputStream.reset(),

protected int markpos

The value of the pos field at the time the last mark method was called.

This value is always in the range -1 through pos. If there is no marked position in the input stream, this field is -1. If there is a marked position in the input stream, then buf[markpos] is the first byte to be supplied as input after a reset operation. If markpos is not -1, then all bytes from positions buf[markpos] through buf[pos-1] must remain in the buffer array (though they may be moved to another place in the buffer array, with suitable adjustments to the values of count, pos, and markpos); they may not be discarded unless and until the difference between pos and markpos exceeds marklimit.
See Also: BufferedInputStream.mark(int), BufferedInputStream.pos,

protected int pos

The current position in the buffer.

The current position in the buffer. This is the index of the next character to be read from the buf array.

This value is always in the range 0 through count. If it is less than count, then buf[pos] is the next byte to be supplied as input; if it is equal to count, then the next read or skip operation will require more bytes to be read from the contained input stream.
See Also: BufferedInputStream.buf,