| public abstract class java.net SocketImpl
|
Java SE 6 |
SocketImpl is a common superclass
of all classes that actually implement sockets. It is used to
create both client and server sockets.
A "plain" socket implements these methods exactly as described, without attempting to go through a firewall or proxy.
| version | 1.44, 04/07/06 |
| since | JDK1.0 |
| Fields | |
|---|---|
| protected java.io.FileDescriptor | fd The file descriptor object for this socket. |
| protected InetAddress | address The IP address of the remote end of this socket. |
| protected int | port The port number on the remote host to which this socket is connected. |
| protected int | localport The local port number to which this socket is connected. |
| Constructors | |
|---|---|
| public | SocketImpl() |
| Methods | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| abstract protected void | accept(SocketImpl s) throws IOException Details
Accepts a connection.
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| abstract protected int | available() throws IOException Details
Returns the number of bytes that can be read from this socket
without blocking.
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| abstract protected void | bind(InetAddress host, int port) throws IOException Details
Binds this socket to the specified local IP address and port number.
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| abstract protected void | close() throws IOException Details
Closes this socket.
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| abstract protected void | connect(String host, int port) throws IOException Details
Connects this socket to the specified port on the named host.
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| abstract protected void | connect(InetAddress address, int port) throws IOException Details
Connects this socket to the specified port number on the specified host.
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| abstract protected void | connect(SocketAddress address, int timeout) throws IOException Details
Connects this socket to the specified port number on the specified host.
A timeout of zero is interpreted as an infinite timeout. The connection
will then block until established or an error occurs.
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| abstract protected void | create(boolean stream) throws IOException Details
Creates either a stream or a datagram socket.
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| abstract protected void | listen(int backlog) throws IOException Details
Sets the maximum queue length for incoming connection indications
(a request to connect) to the count argument. If a
connection indication arrives when the queue is full, the
connection is refused.
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| abstract protected void | sendUrgentData(int data) throws IOException Details
Send one byte of urgent data on the socket.
The byte to be sent is the low eight bits of the parameter
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| protected void | shutdownInput() throws IOException Details
Places the input stream for this socket at "end of stream".
Any data sent to this socket is acknowledged and then
silently discarded.
If you read from a socket input stream after invoking
shutdownInput() on the socket, the stream will return EOF.
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| protected void | shutdownOutput() throws IOException Details
Disables the output stream for this socket.
For a TCP socket, any previously written data will be sent
followed by TCP's normal connection termination sequence.
If you write to a socket output stream after invoking
shutdownOutput() on the socket, the stream will throw
an IOException.
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| protected boolean | supportsUrgentData() Details
Returns whether or not this SocketImpl supports sending
urgent data. By default, false is returned
unless the method is overridden in a sub-class
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| public String | toString() Details
Returns the address and port of this socket as a String.
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| Properties | |||||||||
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| protected java.io.FileDescriptor | getFileDescriptor() Details
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| protected InetAddress | getInetAddress() Details
Returns the value of this socket's address field.
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| abstract protected InputStream | getInputStream() throws IOException Details
Returns an input stream for this socket.
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| protected int | getLocalPort() Details
Returns the value of this socket's localport field.
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| abstract protected OutputStream | getOutputStream() throws IOException Details
Returns an output stream for this socket.
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| protected void | setPerformancePreferences(int connectionTime, int latency, int bandwidth) Details
Sets performance preferences for this socket.
Sockets use the TCP/IP protocol by default. Some implementations may offer alternative protocols which have different performance characteristics than TCP/IP. This method allows the application to express its own preferences as to how these tradeoffs should be made when the implementation chooses from the available protocols. Performance preferences are described by three integers whose values indicate the relative importance of short connection time, low latency, and high bandwidth. The absolute values of the integers are irrelevant; in order to choose a protocol the values are simply compared, with larger values indicating stronger preferences. Negative values represent a lower priority than positive values. If the application prefers short connection time over both low latency and high bandwidth, for example, then it could invoke this method with the values (1, 0, 0). If the application prefers high bandwidth above low latency, and low latency above short connection time, then it could invoke this method with the values (0, 1, 2). By default, this method does nothing, unless it is overridden in a a sub-class.
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| protected int | getPort() Details
Returns the value of this socket's port field.
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