public class ByteQueueInputStream extends InputStream
| Constructor and Description |
|---|
ByteQueueInputStream() |
| Modifier and Type | Method and Description |
|---|---|
void |
addBytes(byte[] bytes) |
int |
available()
Returns the number of bytes that can be read (or skipped over) from
this input stream without blocking by the next caller of a method for
this input stream.
|
void |
close()
Closes this input stream and releases any system resources associated
with the stream.
|
int |
peek(byte[] buf) |
int |
read()
Reads the next byte of data from the input stream.
|
int |
read(byte[] b)
Reads some number of bytes from the input stream and stores them into
the buffer array
b. |
int |
read(byte[] b,
int off,
int len)
Reads up to
len bytes of data from the input stream into
an array of bytes. |
long |
skip(long n)
Skips over and discards
n bytes of data from this input
stream. |
mark, markSupported, resetpublic void addBytes(byte[] bytes)
public int peek(byte[] buf)
public int read()
InputStreamint in the range 0 to
255. If no byte is available because the end of the stream
has been reached, the value -1 is returned. This method
blocks until input data is available, the end of the stream is detected,
or an exception is thrown.
A subclass must provide an implementation of this method.
read in class InputStream-1 if the end of the
stream is reached.public int read(byte[] b)
InputStreamb. The number of bytes actually read is
returned as an integer. This method blocks until input data is
available, end of file is detected, or an exception is thrown.
If b is null, a
NullPointerException is thrown. If the length of
b is zero, then no bytes are read and 0 is
returned; otherwise, there is an attempt to read at least one byte. If
no byte is available because the stream is at end of file, the value
-1 is returned; otherwise, at least one byte is read and
stored into b.
The first byte read is stored into element b[0], the
next one into b[1], and so on. The number of bytes read is,
at most, equal to the length of b. Let k be the
number of bytes actually read; these bytes will be stored in elements
b[0] through b[k-1],
leaving elements b[k] through
b[b.length-1] unaffected.
If the first byte cannot be read for any reason other than end of
file, then an IOException is thrown. In particular, an
IOException is thrown if the input stream has been closed.
The read(b) method for class InputStream
has the same effect as:
read(b, 0, b.length) read in class InputStreamb - the buffer into which the data is read.-1 is there is no more data because the end of
the stream has been reached.InputStream.read(byte[], int, int)public int read(byte[] b,
int off,
int len)
InputStreamlen bytes of data from the input stream into
an array of bytes. An attempt is made to read as many as
len bytes, but a smaller number may be read, possibly
zero. The number of bytes actually read is returned as an integer.
This method blocks until input data is available, end of file is detected, or an exception is thrown.
If b is null, a
NullPointerException is thrown.
If off is negative, or len is negative, or
off+len is greater than the length of the array
b, then an IndexOutOfBoundsException is
thrown.
If len is zero, then no bytes are read and
0 is returned; otherwise, there is an attempt to read at
least one byte. If no byte is available because the stream is at end of
file, the value -1 is returned; otherwise, at least one
byte is read and stored into b.
The first byte read is stored into element b[off], the
next one into b[off+1], and so on. The number of bytes read
is, at most, equal to len. Let k be the number of
bytes actually read; these bytes will be stored in elements
b[off] through b[off+k-1],
leaving elements b[off+k] through
b[off+len-1] unaffected.
In every case, elements b[0] through
b[off] and elements b[off+len] through
b[b.length-1] are unaffected.
If the first byte cannot be read for any reason other than end of
file, then an IOException is thrown. In particular, an
IOException is thrown if the input stream has been closed.
The read(b, off, len) method
for class InputStream simply calls the method
read() repeatedly. If the first such call results in an
IOException, that exception is returned from the call to
the read(b, off, len) method. If
any subsequent call to read() results in a
IOException, the exception is caught and treated as if it
were end of file; the bytes read up to that point are stored into
b and the number of bytes read before the exception
occurred is returned. Subclasses are encouraged to provide a more
efficient implementation of this method.
read in class InputStreamb - the buffer into which the data is read.off - the start offset in array b
at which the data is written.len - the maximum number of bytes to read.-1 if there is no more data because the end of
the stream has been reached.InputStream.read()public long skip(long n)
InputStreamn bytes of data from this input
stream. The skip method may, for a variety of reasons, end
up skipping over some smaller number of bytes, possibly 0.
This may result from any of a number of conditions; reaching end of file
before n bytes have been skipped is only one possibility.
The actual number of bytes skipped is returned. If n is
negative, no bytes are skipped.
The skip method of InputStream creates a
byte array and then repeatedly reads into it until n bytes
have been read or the end of the stream has been reached. Subclasses are
encouraged to provide a more efficient implementation of this method.
skip in class InputStreamn - the number of bytes to be skipped.public int available()
InputStream The available method for class InputStream
always returns 0.
This method should be overridden by subclasses.
available in class InputStreampublic void close()
InputStream The close method of InputStream does
nothing.
close in class InputStream