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Android Reference

SocketImpl

java.net

Class SocketImpl

java.lang.Object
- java.net.SocketImpl

All Implemented Interfaces:

SocketOptions

Direct Known Subclasses:

PlainSocketImpl
```
public abstract class SocketImpl
extends Object
implements SocketOptions
```
This class is the base of all streaming socket implementation classes. Streaming sockets are wrapped by two classes, ServerSocket and Socket at the server and client end of a connection. At the server, there are two types of sockets engaged in communication, the ServerSocket on a well known port (referred to as listener) used to establish a connection and the resulting Socket (referred to as host).

Field Summary

Fields
Modifier and Type	Field and Description
`protected InetAddress`	`address` The remote address this socket is connected to.
`protected FileDescriptor`	`fd` The file descriptor of this socket.
`protected int`	`localport` The local port this socket is connected to.
`protected int`	`port` The remote port this socket is connected to.

Fields inherited from interface java.net.SocketOptions
IP_MULTICAST_IF, IP_MULTICAST_IF2, IP_MULTICAST_LOOP, IP_TOS, SO_BINDADDR, SO_BROADCAST, SO_KEEPALIVE, SO_LINGER, SO_OOBINLINE, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SO_TIMEOUT, TCP_NODELAY

Constructor Summary

Constructors
Constructor and Description

SocketImpl()

Constructors
Constructor and Description
`SocketImpl()`

Method Summary

Methods
Modifier and Type	Method and Description
`protected abstract void`	`accept(SocketImpl newSocket)` Waits for an incoming request and blocks until the connection is opened on the given socket.
`protected abstract int`	`available()` Returns the available number of bytes which are readable from this socket without blocking.
`protected abstract void`	`bind(InetAddress address, int port)` Binds this socket to the specified local host address and port number.
`protected abstract void`	`close()` Closes this socket.
`protected abstract void`	`connect(InetAddress address, int port)` Connects this socket to the specified remote host address and port number.
`protected abstract void`	`connect(SocketAddress remoteAddr, int timeout)` Connects this socket to the remote host address and port number specified by the `SocketAddress` object with the given timeout.
`protected abstract void`	`connect(String host, int port)` Connects this socket to the specified remote host and port number.
`protected abstract void`	`create(boolean isStreaming)` Creates a new unconnected socket.
`FileDescriptor`	`getFD$()`
`protected FileDescriptor`	`getFileDescriptor()` Gets the file descriptor of this socket.
`protected InetAddress`	`getInetAddress()` Gets the remote address this socket is connected to.
`protected abstract InputStream`	`getInputStream()` Gets the input stream of this socket.
`protected int`	`getLocalPort()` Gets the local port number of this socket.
`protected abstract OutputStream`	`getOutputStream()` Gets the output stream of this socket.
`protected int`	`getPort()` Gets the remote port number of this socket.
`protected abstract void`	`listen(int backlog)` Listens for connection requests on this streaming socket.
`protected abstract void`	`sendUrgentData(int value)` Sends the single byte of urgent data on the socket.
`protected void`	`setPerformancePreferences(int connectionTime, int latency, int bandwidth)` Sets performance preference for connection time, latency and bandwidth.
`protected void`	`shutdownInput()` Closes the input channel of this socket.
`protected void`	`shutdownOutput()` Closes the output channel of this socket.
`protected boolean`	`supportsUrgentData()` Returns whether the socket supports urgent data or not.
`String`	`toString()` Returns a string containing a concise, human-readable description of the socket.

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
  - address
```
protected InetAddress address
```
    The remote address this socket is connected to.
  - port
```
protected int port
```
    The remote port this socket is connected to.
  - fd
```
protected FileDescriptor fd
```
    The file descriptor of this socket.
  - localport
```
protected int localport
```
    The local port this socket is connected to.
- Constructor Detail
  - SocketImpl
```
public SocketImpl()
```
- Method Detail
  - accept
```
protected abstract void accept(SocketImpl newSocket)
                        throws IOException
```
    Waits for an incoming request and blocks until the connection is opened on the given socket.
    
    Parameters:
    newSocket - the socket to accept connections on.
    
    Throws:
    
    IOException - if an error occurs while accepting a new connection.
  - available
```
protected abstract int available()
                          throws IOException
```
    Returns the available number of bytes which are readable from this socket without blocking.
    
    Returns:
    the number of bytes that may be read without blocking.
    
    Throws:
    
    IOException - if an error occurs while reading the number of bytes.
  - bind
```
protected abstract void bind(InetAddress address,
        int port)
                      throws IOException
```
    Binds this socket to the specified local host address and port number.
    
    Parameters:
    address - the local machine address to bind this socket to.
    port - the port on the local machine to bind this socket to.
    
    Throws:
    
    IOException - if an error occurs while binding this socket.
  - close
```
protected abstract void close()
                       throws IOException
```
    Closes this socket. This makes later access invalid.
    
    Throws:
    
    IOException - if an error occurs while closing this socket.
  - connect
```
protected abstract void connect(String host,
           int port)
                         throws IOException
```
    Connects this socket to the specified remote host and port number.
    
    Parameters:
    host - the remote host this socket has to be connected to.
    port - the remote port on which this socket has to be connected.
    
    Throws:
    
    IOException - if an error occurs while connecting to the remote host.
  - connect
```
protected abstract void connect(InetAddress address,
           int port)
                         throws IOException
```
    Connects this socket to the specified remote host address and port number.
    
    Parameters:
    address - the remote host address this socket has to be connected to.
    port - the remote port on which this socket has to be connected.
    
    Throws:
    
    IOException - if an error occurs while connecting to the remote host.
  - create
```
protected abstract void create(boolean isStreaming)
                        throws IOException
```
    Creates a new unconnected socket. The argument isStreaming defines whether the new socket is a streaming or a datagram socket.
    
    Parameters:
    isStreaming - defines whether the type of the new socket is streaming or datagram.
    
    Throws:
    
    IOException - if an error occurs while creating the socket.
  - getFileDescriptor
```
protected FileDescriptor getFileDescriptor()
```
    Gets the file descriptor of this socket.
    
    Returns:
    the file descriptor of this socket.
  - getFD$
```
public FileDescriptor getFD$()
```
  - getInetAddress
```
protected InetAddress getInetAddress()
```
    Gets the remote address this socket is connected to.
    
    Returns:
    the remote address of this socket.
  - getInputStream
```
protected abstract InputStream getInputStream()
                                       throws IOException
```
    Gets the input stream of this socket.
    
    Returns:
    the input stream of this socket.
    
    Throws:
    
    IOException - if an error occurs while accessing the input stream.
  - getLocalPort
```
protected int getLocalPort()
```
    Gets the local port number of this socket. The field is initialized to -1 and upon demand will go to the IP stack to get the bound value. See the class comment for the context of the local port.
    
    Returns:
    the local port number this socket is bound to.
  - getOutputStream
```
protected abstract OutputStream getOutputStream()
                                         throws IOException
```
    Gets the output stream of this socket.
    
    Returns:
    the output stream of this socket.
    
    Throws:
    
    IOException - if an error occurs while accessing the output stream.
  - getPort
```
protected int getPort()
```
    Gets the remote port number of this socket. This value is not meaningful when this instance is wrapped by a ServerSocket.
    
    Returns:
    the remote port this socket is connected to.
  - listen
```
protected abstract void listen(int backlog)
                        throws IOException
```
    Listens for connection requests on this streaming socket. Incoming connection requests are queued up to the limit specified by backlog. Additional requests are rejected. This method may only be invoked on stream sockets.
    
    Parameters:
    backlog - the maximum number of outstanding connection requests.
    
    Throws:
    
    IOException - if an error occurs while listening.
  - toString
```
public String toString()
```
    Returns a string containing a concise, human-readable description of the socket.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    the textual representation of this socket.
  - shutdownInput
```
protected void shutdownInput()
                      throws IOException
```
    Closes the input channel of this socket.
    This default implementation always throws an IOException to indicate that the subclass should have overridden this method.
    
    Throws:
    
    IOException - always because this method should be overridden.
  - shutdownOutput
```
protected void shutdownOutput()
                       throws IOException
```
    Closes the output channel of this socket.
    This default implementation always throws an IOException to indicate that the subclass should have overridden this method.
    
    Throws:
    
    IOException - always because this method should be overridden.
  - connect
```
protected abstract void connect(SocketAddress remoteAddr,
           int timeout)
                         throws IOException
```
    Connects this socket to the remote host address and port number specified by the SocketAddress object with the given timeout. This method will block indefinitely if the timeout is set to zero.
    
    Parameters:
    remoteAddr - the remote host address and port number to connect to.
    timeout - the timeout value in milliseconds.
    
    Throws:
    
    IOException - if an error occurs while connecting.
  - supportsUrgentData
```
protected boolean supportsUrgentData()
```
    Returns whether the socket supports urgent data or not. Subclasses should override this method.
    
    Returns:
    false because subclasses must override this method.
  - sendUrgentData
```
protected abstract void sendUrgentData(int value)
                                throws IOException
```
    Sends the single byte of urgent data on the socket.
    
    Parameters:
    value - the byte of urgent data.
    
    Throws:
    
    IOException - if an error occurs sending urgent data.
  - setPerformancePreferences
```
protected void setPerformancePreferences(int connectionTime,
                             int latency,
                             int bandwidth)
```
    Sets performance preference for connection time, latency and bandwidth. Does nothing by default.
    
    Parameters:
    connectionTime - the importance of connect time.
    latency - the importance of latency.
    bandwidth - the importance of bandwidth.

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IT. Expert System.

Android Reference

SocketImpl

Class SocketImpl

Field Summary

Fields inherited from interface java.net.SocketOptions

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.net.SocketOptions

Field Detail

address

port

fd

localport

Constructor Detail

SocketImpl

Method Detail

accept

available

bind

close

connect

connect

create

getFileDescriptor

getFD$

getInetAddress

getInputStream

getLocalPort

getOutputStream

getPort

listen

toString

shutdownInput

shutdownOutput

connect

supportsUrgentData

sendUrgentData

setPerformancePreferences

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary