|
Préférences
Moteurs de recherche
|
||||||||||||||||||||||||||||||||||||
JavaTM 2 Platform Std. Ed. v1.6.0
java.io
|
Field Summary | |
---|---|
protected byte[] |
buffer
The circular buffer into which incoming data is placed. |
protected int |
in
The index of the position in the circular buffer at which the next byte of data will be stored when received from the connected piped output stream. |
protected int |
out
The index of the position in the circular buffer at which the next byte of data will be read by this piped input stream. |
protected static int |
PIPE_SIZE
The default size of the pipe's circular input buffer. |
Constructor Summary | |
---|---|
PipedInputStream()
Creates a PipedInputStream so
that it is not yet connected. |
|
PipedInputStream(int pipeSize)
Creates a PipedInputStream so that it is not yet
connected and
uses the specified pipe size for the pipe's buffer. |
|
PipedInputStream(PipedOutputStream src)
Creates a PipedInputStream so
that it is connected to the piped output
stream src . |
|
PipedInputStream(PipedOutputStream src,
int pipeSize)
Creates a PipedInputStream so that it is
connected to the piped output stream
src and uses the specified pipe size for
the pipe's buffer. |
Method Summary | |
---|---|
int |
available()
Returns the number of bytes that can be read from this input stream without blocking. |
void |
close()
Closes this piped input stream and releases any system resources associated with the stream. |
void |
connect(PipedOutputStream src)
Causes this piped input stream to be connected to the piped output stream src . |
int |
read()
Reads the next byte of data from this piped input stream. |
int |
read(byte[] b,
int off,
int len)
Reads up to len bytes of data from this piped input
stream into an array of bytes. |
protected void |
receive(int b)
Receives a byte of data. |
Methods inherited from class java.io.InputStream |
---|
mark, markSupported, read, reset, skip |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected static final int PIPE_SIZE
protected byte[] buffer
protected int in
in<0
implies the buffer is empty,
in==out
implies the buffer is full
protected int out
Constructor Detail |
---|
public PipedInputStream(PipedOutputStream src) throws IOException
PipedInputStream
so
that it is connected to the piped output
stream src
. Data bytes written
to src
will then be available
as input from this stream.
src
- the stream to connect to.
IOException
- if an I/O error occurs.public PipedInputStream(PipedOutputStream src, int pipeSize) throws IOException
PipedInputStream
so that it is
connected to the piped output stream
src
and uses the specified pipe size for
the pipe's buffer.
Data bytes written to src
will then
be available as input from this stream.
src
- the stream to connect to.pipeSize
- the size of the pipe's buffer.
IOException
- if an I/O error occurs.
IllegalArgumentException
- if pipeSize <= 0
.public PipedInputStream()
PipedInputStream
so
that it is not yet connected.
It must be connected to a
PipedOutputStream
before being used.
public PipedInputStream(int pipeSize)
PipedInputStream
so that it is not yet
connected and
uses the specified pipe size for the pipe's buffer.
It must be connected to a PipedOutputStream
before being used.
pipeSize
- the size of the pipe's buffer.
IllegalArgumentException
- if pipeSize <= 0
.Method Detail |
---|
public void connect(PipedOutputStream src) throws IOException
src
.
If this object is already connected to some
other piped output stream, an IOException
is thrown.
If src
is an
unconnected piped output stream and snk
is an unconnected piped input stream, they
may be connected by either the call:
snk.connect(src)
or the call:
src.connect(snk)
The two calls have the same effect.
src
- The piped output stream to connect to.
IOException
- if an I/O error occurs.protected void receive(int b) throws IOException
b
- the byte being received
IOException
- If the pipe is broken
,
unconnected
,
closed, or if an I/O error occurs.public int read() throws IOException
int
in the range
0
to 255
.
This method blocks until input data is available, the end of the
stream is detected, or an exception is thrown.
read
in class InputStream
-1
if the end of the
stream is reached.
IOException
- if the pipe is
unconnected
,
broken
, closed,
or if an I/O error occurs.public int read(byte[] b, int off, int len) throws IOException
len
bytes of data from this piped input
stream into an array of bytes. Less than len
bytes
will be read if the end of the data stream is reached or if
len
exceeds the pipe's buffer size.
If len
is zero, then no bytes are read and 0 is returned;
otherwise, the method blocks until at least 1 byte of input is
available, end of the stream has been detected, or an exception is
thrown.
read
in class InputStream
b
- the buffer into which the data is read.off
- the start offset in the destination array b
len
- the maximum number of bytes read.
-1
if there is no more data because the end of
the stream has been reached.
NullPointerException
- If b
is null
.
IndexOutOfBoundsException
- If off
is negative,
len
is negative, or len
is greater than
b.length - off
IOException
- if the pipe is broken
,
unconnected
,
closed, or if an I/O error occurs.InputStream.read()
public int available() throws IOException
available
in class InputStream
0
if this input stream has been
closed by invoking its close()
method, or if the pipe
is unconnected
, or
broken
.
IOException
- if an I/O error occurs.public void close() throws IOException
close
in interface Closeable
close
in class InputStream
IOException
- if an I/O error occurs.