ProxySelector

public abstract class ProxySelector
extends Object

java.lang.Object
↳	java.net.ProxySelector

Selects the proxy server to use, if any, when connecting to the network resource referenced by a URL. A proxy selector is a concrete sub-class of this class and is registered by invoking the setDefault method. The currently registered proxy selector can be retrieved by calling getDefault method.

When a proxy selector is registered, for instance, a subclass of URLConnection class should call the select method for each URL request so that the proxy selector can decide if a direct, or proxied connection should be used. The select method returns an iterator over a collection with the preferred connection approach.

If a connection cannot be established to a proxy (PROXY or SOCKS) servers then the caller should call the proxy selector's connectFailed method to notify the proxy selector that the proxy server is unavailable.

The default proxy selector does enforce a set of System Properties related to proxy settings.

Summary

Public constructors
`ProxySelector()`

Public methods
`abstract void`	`connectFailed(URI uri, SocketAddress sa, IOException ioe)` Called to indicate that a connection could not be established to a proxy/socks server.
`static ProxySelector`	`getDefault()` Gets the system-wide proxy selector.
`abstract List<Proxy>`	`select(URI uri)` Selects all the applicable proxies based on the protocol to access the resource with and a destination address to access the resource at.
`static void`	`setDefault(ProxySelector ps)` Sets (or unsets) the system-wide proxy selector.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

ProxySelector

Added in API level 1

public ProxySelector ()

Public methods

connectFailed

Added in API level 1

public abstract void connectFailed (URI uri, 
                SocketAddress sa, 
                IOException ioe)

Called to indicate that a connection could not be established to a proxy/socks server. An implementation of this method can temporarily remove the proxies or reorder the sequence of proxies returned by select(java.net.URI), using the address and the IOException caught when trying to connect.

Parameters
`uri`	`URI`: The URI that the proxy at sa failed to serve.
`sa`	`SocketAddress`: The socket address of the proxy/SOCKS server
`ioe`	`IOException`: The I/O exception thrown when the connect failed.

Throws
`IllegalArgumentException`	if either argument is null

getDefault

Added in API level 1

public static ProxySelector getDefault ()

Gets the system-wide proxy selector.

Returns
`ProxySelector`	the system-wide `ProxySelector`

Throws
`SecurityException`	If a security manager has been installed and it denies `NetPermission("getProxySelector")`

See also:

setDefault(ProxySelector)

select

Added in API level 1

public abstract List<Proxy> select (URI uri)

Selects all the applicable proxies based on the protocol to access the resource with and a destination address to access the resource at. The format of the URI is defined as follow:

http URI for http connections
https URI for https connections
socket://host:port
for tcp client sockets connections

Parameters
`uri`	`URI`: The URI that a connection is required to

Returns
`List<Proxy>`	a List of Proxies. Each element in the the List is of type `Proxy`; when no proxy is available, the list will contain one element of type `Proxy` that represents a direct connection.

Throws
`IllegalArgumentException`	if the argument is null

setDefault

Added in API level 1

public static void setDefault (ProxySelector ps)

Sets (or unsets) the system-wide proxy selector. Note: non-standard protocol handlers may ignore this setting.

Parameters
`ps`	`ProxySelector`: The HTTP proxy selector, or `null` to unset the proxy selector.

Throws
`SecurityException`	If a security manager has been installed and it denies `NetPermission("setProxySelector")`

See also:

getDefault()