Java 2 Platform SE v1.3.1: Class SocketImpl - JDK 5 Documentation v1.3.1, Java 2 SDK 英文文档

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java.net
Class SocketImpl

java.lang.Object
  |
  +--java.net.SocketImpl

All Implemented Interfaces:: SocketOptions

public abstract class SocketImpl
extends Object
implements SocketOptions

The abstract class 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.

Since:: JDK1.0

Field Summary

protected InetAddress address
          The IP address of the remote end of this socket.

protected FileDescriptor fd
          The file descriptor object for this socket.

protected int localport
          The local port number to which this socket is connected.

protected int port
          The port number on the remote host to which this socket is connected.

Fields inherited from interface java.net.SocketOptions

IP_MULTICAST_IF, SO_BINDADDR, SO_KEEPALIVE, SO_LINGER, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SO_TIMEOUT, TCP_NODELAY

Constructor Summary

SocketImpl()


Method Summary

protected abstract void accept(SocketImpl s)
          Accepts a connection.

protected abstract int available()
          Returns the number of bytes that can be read from this socket without blocking.

protected abstract void bind(InetAddress host, int port)
          Binds this socket to the specified port number on the specified host.

protected abstract void close()
          Closes this socket.

protected abstract void connect(InetAddress address, int port)
          Connects this socket to the specified port number on the specified host.

protected abstract void connect(String host, int port)
          Connects this socket to the specified port on the named host.

protected abstract void create(boolean stream)
          Creates either a stream or a datagram socket.

protected FileDescriptor getFileDescriptor()
          Returns the value of this socket's fd field.

protected InetAddress getInetAddress()
          Returns the value of this socket's address field.

protected abstract InputStream getInputStream()
          Returns an input stream for this socket.

protected int getLocalPort()
          Returns the value of this socket's localport field.

protected abstract OutputStream getOutputStream()
          Returns an output stream for this socket.

protected int getPort()
          Returns the value of this socket's port field.

protected abstract void listen(int backlog)
          Sets the maximum queue length for incoming connection indications (a request to connect) to the count argument.

protected void shutdownInput()
          Places the input stream for this socket at "end of stream".

protected void shutdownOutput()
          Disables the output stream for this socket.

String toString()
          Returns the address and port of this socket as a String.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.net.SocketOptions

getOption, setOption

Field Detail

fd

protected FileDescriptor fd

The file descriptor object for this socket.

address

protected InetAddress address

The IP address of the remote end of this socket.

port

protected int port

The port number on the remote host to which this socket is connected.

localport

protected int localport

The local port number to which this socket is connected.

Constructor Detail

SocketImpl

public SocketImpl()

Method Detail

create

protected abstract void create(boolean stream)
                        throws IOException

Creates either a stream or a datagram socket.

Parameters:: stream - if true, create a stream socket; otherwise, create a datagram socket.
Throws:: IOException - if an I/O error occurs while creating the socket.

connect

protected abstract void connect(String host,
                                int port)
                         throws IOException

Connects this socket to the specified port on the named host.

Parameters:: host - the name of the remote host.; port - the port number.
Throws:: IOException - if an I/O error occurs when connecting to the remote host.

connect

protected abstract void connect(InetAddress address,
                                int port)
                         throws IOException

Connects this socket to the specified port number on the specified host.

Parameters:: address - the IP address of the remote host.; port - the port number.
Throws:: IOException - if an I/O error occurs when attempting a connection.

bind

protected abstract void bind(InetAddress host,
                             int port)
                      throws IOException

Binds this socket to the specified port number on the specified host.

Parameters:: host - the IP address of the remote host.; port - the port number.
Throws:: IOException - if an I/O error occurs when binding this socket.

listen

protected abstract void listen(int backlog)
                        throws IOException

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.

Parameters:: backlog - the maximum length of the queue.
Throws:: IOException - if an I/O error occurs when creating the queue.

accept

protected abstract void accept(SocketImpl s)
                        throws IOException

Accepts a connection.

Parameters:: s - the accepted connection.
Throws:: IOException - if an I/O error occurs when accepting the connection.

getInputStream

protected abstract InputStream getInputStream()
                                       throws IOException

Returns an input stream for this socket.

Returns:: a stream for reading from this socket.
Throws:: IOException - if an I/O error occurs when creating the input stream.

getOutputStream

protected abstract OutputStream getOutputStream()
                                         throws IOException

Returns an output stream for this socket.

Returns:: an output stream for writing to this socket.
Throws:: IOException - if an I/O error occurs when creating the output stream.

available

protected abstract int available()
                          throws IOException

Returns the number of bytes that can be read from this socket without blocking.

Returns:: the number of bytes that can be read from this socket without blocking.
Throws:: IOException - if an I/O error occurs when determining the number of bytes available.

close

protected abstract void close()
                       throws IOException

Closes this socket.

Throws:: IOException - if an I/O error occurs when closing this socket.

shutdownInput

protected void shutdownInput()
                      throws IOException

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.

Throws:: IOException - if an I/O error occurs when shutting down this socket.
See Also:: Socket.shutdownOutput(), Socket.close(), Socket.setSoLinger(boolean, int)

shutdownOutput

protected void shutdownOutput()
                       throws IOException

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.

Throws:: IOException - if an I/O error occurs when shutting down this socket.
See Also:: Socket.shutdownInput(), Socket.close(), Socket.setSoLinger(boolean, int)

getFileDescriptor

protected FileDescriptor getFileDescriptor()

Returns the value of this socket's fd field.

Returns:: the value of this socket's fd field.
See Also:: fd

getInetAddress

protected InetAddress getInetAddress()

Returns the value of this socket's address field.

Returns:: the value of this socket's address field.
See Also:: address

getPort

protected int getPort()

Returns the value of this socket's port field.

Returns:: the value of this socket's port field.
See Also:: port

getLocalPort

protected int getLocalPort()

Returns the value of this socket's localport field.

Returns:: the value of this socket's localport field.
See Also:: localport

toString

public String toString()

Returns the address and port of this socket as a String.

Overrides:: toString in class Object

Returns:: a string representation of this socket.

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Java, Java 2D, and JDBC are trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries.
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Field Summary
`protected InetAddress`	`address` The IP address of the remote end of this socket.
`protected FileDescriptor`	`fd` The file descriptor object for this socket.
`protected int`	`localport` The local port number to which this socket is connected.
`protected int`	`port` The port number on the remote host to which this socket is connected.

Method Summary
`protected abstract void`	`accept(SocketImpl s)` Accepts a connection.
`protected abstract int`	`available()` Returns the number of bytes that can be read from this socket without blocking.
`protected abstract void`	`bind(InetAddress host, int port)` Binds this socket to the specified port number on the specified host.
`protected abstract void`	`close()` Closes this socket.
`protected abstract void`	`connect(InetAddress address, int port)` Connects this socket to the specified port number on the specified host.
`protected abstract void`	`connect(String host, int port)` Connects this socket to the specified port on the named host.
`protected abstract void`	`create(boolean stream)` Creates either a stream or a datagram socket.
`protected FileDescriptor`	`getFileDescriptor()` Returns the value of this socket's `fd` field.
`protected InetAddress`	`getInetAddress()` Returns the value of this socket's `address` field.
`protected abstract InputStream`	`getInputStream()` Returns an input stream for this socket.
`protected int`	`getLocalPort()` Returns the value of this socket's `localport` field.
`protected abstract OutputStream`	`getOutputStream()` Returns an output stream for this socket.
`protected int`	`getPort()` Returns the value of this socket's `port` field.
`protected abstract void`	`listen(int backlog)` Sets the maximum queue length for incoming connection indications (a request to connect) to the `count` argument.
`protected void`	`shutdownInput()` Places the input stream for this socket at "end of stream".
`protected void`	`shutdownOutput()` Disables the output stream for this socket.
`String`	`toString()` Returns the address and port of this socket as a `String`.

Java 2 Platform SE v1.3.1: Class SocketImpl - JDK 5 Documentation v1.3.1, Java 2 SDK 英文文档

java.net Class SocketImpl

fd

address

port

localport

SocketImpl

create

connect

connect

bind

listen

accept

getInputStream

getOutputStream

available

close

shutdownInput

shutdownOutput

getFileDescriptor

getInetAddress

getPort

getLocalPort

toString

java.net
Class SocketImpl