SocketFactory (Java Platform SE 8 ) (original) (raw)

java.lang.Object
- javax.net.SocketFactory
Direct Known Subclasses:
SSLSocketFactory

public abstract class SocketFactory
extends Object
This class creates sockets. It may be subclassed by other factories, which create particular subclasses of sockets and thus provide a general framework for the addition of public socket-level functionality.
Socket factories are a simple way to capture a variety of policies related to the sockets being constructed, producing such sockets in a way which does not require special configuration of the code which asks for the sockets:

Due to polymorphism of both factories and sockets, different kinds of sockets can be used by the same application code just by passing it different kinds of factories.
Factories can themselves be customized with parameters used in socket construction. So for example, factories could be customized to return sockets with different networking timeouts or security parameters already configured.
The sockets returned to the application can be subclasses of java.net.Socket, so that they can directly expose new APIs for features such as compression, security, record marking, statistics collection, or firewall tunneling.
Factory classes are specified by environment-specific configuration mechanisms. For example, the getDefault method could return a factory that was appropriate for a particular user or applet, and a framework could use a factory customized to its own purposes.
Since:
1.4
See Also:
ServerSocketFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SocketFactory()	Creates a SocketFactory.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods

Modifier and Type	Method	Description
Socket	createSocket()	Creates an unconnected socket.
abstract Socket	createSocket(InetAddress host, int port)	Creates a socket and connects it to the specified port number at the specified address.
abstract Socket	createSocket(InetAddress address, int port,InetAddress localAddress, int localPort)	Creates a socket and connect it to the specified remote address on the specified remote port.
abstract Socket	createSocket(String host, int port)	Creates a socket and connects it to the specified remote host at the specified remote port.
abstract Socket	createSocket(String host, int port,InetAddress localHost, int localPort)	Creates a socket and connects it to the specified remote host on the specified remote port.
static SocketFactory	getDefault()	Returns a copy of the environment's default socket factory.

   * ### Methods inherited from class java.lang.[Object](../../java/lang/Object.html "class in java.lang")  
   `[clone](../../java/lang/Object.html#clone--), [equals](../../java/lang/Object.html#equals-java.lang.Object-), [finalize](../../java/lang/Object.html#finalize--), [getClass](../../java/lang/Object.html#getClass--), [hashCode](../../java/lang/Object.html#hashCode--), [notify](../../java/lang/Object.html#notify--), [notifyAll](../../java/lang/Object.html#notifyAll--), [toString](../../java/lang/Object.html#toString--), [wait](../../java/lang/Object.html#wait--), [wait](../../java/lang/Object.html#wait-long-), [wait](../../java/lang/Object.html#wait-long-int-)`

Constructor Detail

 * #### SocketFactory  
 protected SocketFactory()  
 Creates a `SocketFactory`.

Method Detail

* #### getDefault  
public static [SocketFactory](../../javax/net/SocketFactory.html "class in javax.net") getDefault()  
Returns a copy of the environment's default socket factory.  
Returns:  
the default `SocketFactory`  
* #### createSocket  
public [Socket](../../java/net/Socket.html "class in java.net") createSocket()  
                    throws [IOException](../../java/io/IOException.html "class in java.io")  
Creates an unconnected socket.  
Returns:  
the unconnected socket  
Throws:  
`[IOException](../../java/io/IOException.html "class in java.io")` \- if the socket cannot be created  
See Also:  
[Socket.connect(java.net.SocketAddress)](../../java/net/Socket.html#connect-java.net.SocketAddress-), [Socket.connect(java.net.SocketAddress, int)](../../java/net/Socket.html#connect-java.net.SocketAddress-int-), [Socket.Socket()](../../java/net/Socket.html#Socket--)  
* #### createSocket  
public abstract [Socket](../../java/net/Socket.html "class in java.net") createSocket([String](../../java/lang/String.html "class in java.lang") host,  
                                    int port)  
                             throws [IOException](../../java/io/IOException.html "class in java.io"),  
                                    [UnknownHostException](../../java/net/UnknownHostException.html "class in java.net")  
Creates a socket and connects it to the specified remote host at the specified remote port. This socket is configured using the socket options established for this factory.  
 If there is a security manager, its `checkConnect` method is called with the host address and `port` as its arguments. This could result in a SecurityException.  
Parameters:  
`host` \- the server host name with which to connect, or`null` for the loopback address.  
`port` \- the server port  
Returns:  
the `Socket`  
Throws:  
`[IOException](../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs when creating the socket  
`[SecurityException](../../java/lang/SecurityException.html "class in java.lang")` \- if a security manager exists and its`checkConnect` method doesn't allow the operation.  
`[UnknownHostException](../../java/net/UnknownHostException.html "class in java.net")` \- if the host is not known  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.  
See Also:  
[SecurityManager.checkConnect(java.lang.String, int)](../../java/lang/SecurityManager.html#checkConnect-java.lang.String-int-), [Socket.Socket(String, int)](../../java/net/Socket.html#Socket-java.lang.String-int-)  
* #### createSocket  
public abstract [Socket](../../java/net/Socket.html "class in java.net") createSocket([String](../../java/lang/String.html "class in java.lang") host,  
                                    int port,  
                                    [InetAddress](../../java/net/InetAddress.html "class in java.net") localHost,  
                                    int localPort)  
                             throws [IOException](../../java/io/IOException.html "class in java.io"),  
                                    [UnknownHostException](../../java/net/UnknownHostException.html "class in java.net")  
Creates a socket and connects it to the specified remote host on the specified remote port. The socket will also be bound to the local address and port supplied. This socket is configured using the socket options established for this factory.  
 If there is a security manager, its `checkConnect` method is called with the host address and `port` as its arguments. This could result in a SecurityException.  
Parameters:  
`host` \- the server host name with which to connect, or`null` for the loopback address.  
`port` \- the server port  
`localHost` \- the local address the socket is bound to  
`localPort` \- the local port the socket is bound to  
Returns:  
the `Socket`  
Throws:  
`[IOException](../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs when creating the socket  
`[SecurityException](../../java/lang/SecurityException.html "class in java.lang")` \- if a security manager exists and its`checkConnect` method doesn't allow the operation.  
`[UnknownHostException](../../java/net/UnknownHostException.html "class in java.net")` \- if the host is not known  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the port parameter or localPort parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.  
See Also:  
[SecurityManager.checkConnect(java.lang.String, int)](../../java/lang/SecurityManager.html#checkConnect-java.lang.String-int-), [Socket.Socket(String, int, java.net.InetAddress, int)](../../java/net/Socket.html#Socket-java.lang.String-int-java.net.InetAddress-int-)  
* #### createSocket  
public abstract [Socket](../../java/net/Socket.html "class in java.net") createSocket([InetAddress](../../java/net/InetAddress.html "class in java.net") host,  
                                    int port)  
                             throws [IOException](../../java/io/IOException.html "class in java.io")  
Creates a socket and connects it to the specified port number at the specified address. This socket is configured using the socket options established for this factory.  
 If there is a security manager, its `checkConnect` method is called with the host address and `port` as its arguments. This could result in a SecurityException.  
Parameters:  
`host` \- the server host  
`port` \- the server port  
Returns:  
the `Socket`  
Throws:  
`[IOException](../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs when creating the socket  
`[SecurityException](../../java/lang/SecurityException.html "class in java.lang")` \- if a security manager exists and its`checkConnect` method doesn't allow the operation.  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if `host` is null.  
See Also:  
[SecurityManager.checkConnect(java.lang.String, int)](../../java/lang/SecurityManager.html#checkConnect-java.lang.String-int-), [Socket.Socket(java.net.InetAddress, int)](../../java/net/Socket.html#Socket-java.net.InetAddress-int-)  
* #### createSocket  
public abstract [Socket](../../java/net/Socket.html "class in java.net") createSocket([InetAddress](../../java/net/InetAddress.html "class in java.net") address,  
                                    int port,  
                                    [InetAddress](../../java/net/InetAddress.html "class in java.net") localAddress,  
                                    int localPort)  
                             throws [IOException](../../java/io/IOException.html "class in java.io")  
Creates a socket and connect it to the specified remote address on the specified remote port. The socket will also be bound to the local address and port suplied. The socket is configured using the socket options established for this factory.  
 If there is a security manager, its `checkConnect` method is called with the host address and `port` as its arguments. This could result in a SecurityException.  
Parameters:  
`address` \- the server network address  
`port` \- the server port  
`localAddress` \- the client network address  
`localPort` \- the client port  
Returns:  
the `Socket`  
Throws:  
`[IOException](../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs when creating the socket  
`[SecurityException](../../java/lang/SecurityException.html "class in java.lang")` \- if a security manager exists and its`checkConnect` method doesn't allow the operation.  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if the port parameter or localPort parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if `address` is null.  
See Also:  
[SecurityManager.checkConnect(java.lang.String, int)](../../java/lang/SecurityManager.html#checkConnect-java.lang.String-int-), [Socket.Socket(java.net.InetAddress, int, java.net.InetAddress, int)](../../java/net/Socket.html#Socket-java.net.InetAddress-int-java.net.InetAddress-int-)

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SocketFactory (Java Platform SE 8 ) (original) (raw)

Constructor Summary

Method Summary

Constructor Detail

Method Detail