Provides the default equals calculation. May be overidden by handlers for other protocols that have different requirements for equals(). This method requires that none of its arguments is null. This is guaranteed by the fact that it is only called by java.net.URL class.

u1	a URL object
u2	a URL object
return	true if the two urls are considered equal, ie. they refer to the same fragment in the same file.
since	1.3

Provides the default hash calculation. May be overidden by handlers for other protocols that have different requirements for hashCode calculation.

u	a URL object
return	an int suitable for hash table indexing
since	1.3

Compares the host components of two URLs.

u1	the URL of the first host to compare
u2	the URL of the second host to compare
return	true if and only if they are equal, false otherwise.
since	1.3

Opens a connection to the object referenced by the URL argument. This method should be overridden by a subclass.

If for the handler's protocol (such as HTTP or JAR), there exists a public, specialized URLConnection subclass belonging to one of the following packages or one of their subpackages: java.lang, java.io, java.util, java.net, the connection returned will be of that subclass. For example, for HTTP an HttpURLConnection will be returned, and for JAR a JarURLConnection will be returned.

u	the URL that this connects to.
return	a URLConnection object for the URL.
Throws	IOException: if an I/O error occurs while opening the connection.

Same as openConnection(URL), except that the connection will be made through the specified proxy; Protocol handlers that do not support proxying will ignore the proxy parameter and make a normal connection. Calling this method preempts the system's default ProxySelector settings.

u	the URL that this connects to.
p	the proxy through which the connection will be made. If direct connection is desired, Proxy.NO_PROXY should be specified.
return	a URLConnection object for the URL.
Throws	IOException: if an I/O error occurs while opening the connection.
Throws	IllegalArgumentException: if either u or p is null, or p has the wrong type.
Throws	UnsupportedOperationException: if the subclass that implements the protocol doesn't support this method.
since	1.5

Parses the string representation of a URL into a URL object.

If there is any inherited context, then it has already been copied into the URL argument.

The parseURL method of URLStreamHandler parses the string representation as if it were an http specification. Most URL protocol families have a similar parsing. A stream protocol handler for a protocol that has a different syntax must override this routine.

u	the URL to receive the result of parsing the spec.
spec	the String representing the URL that must be parsed.
start	the character index at which to begin parsing. This is just past the ':' (if there is one) that specifies the determination of the protocol name.
limit	the character position to stop parsing at. This is the end of the string or the position of the "#" character, if present. All information after the sharp sign indicates an anchor.

Compare two urls to see whether they refer to the same file, i.e., having the same protocol, host, port, and path. This method requires that none of its arguments is null. This is guaranteed by the fact that it is only called indirectly by java.net.URL class.

u1	a URL object
u2	a URL object
return	true if u1 and u2 refer to the same file
since	1.3

Converts a URL of a specific protocol to a String.

u	the URL.
return	a string representation of the URL argument.

Returns the default port for a URL parsed by this handler. This method is meant to be overidden by handlers with default port numbers.

return	the default port for a URL parsed by this handler.
since	1.3

Get the IP address of our host. An empty host field or a DNS failure will result in a null return.

u	a URL object
return	an InetAddress representing the host IP address.
since	1.3

Sets the fields of the URL argument to the indicated values. Only classes derived from URLStreamHandler are supposed to be able to call the set method on a URL.

u	the URL to modify.
protocol	the protocol name.
host	the remote host value for the URL.
port	the port on the remote machine.
authority	the authority part for the URL.
userInfo	the userInfo part of the URL.
path	the path component of the URL.
query	the query part for the URL.
ref	the reference.
Throws	SecurityException: if the protocol handler of the URL is different from this one
since	1.3
See also	set(java.lang.String, java.lang.String, int, java.lang.String, java.lang.String)

Sets the fields of the URL argument to the indicated values. Only classes derived from URLStreamHandler are supposed to be able to call the set method on a URL.

u	the URL to modify.
protocol	the protocol name. This value is ignored since 1.2.
host	the remote host value for the URL.
port	the port on the remote machine.
file	the file.
ref	the reference.
Throws	SecurityException: if the protocol handler of the URL is different from this one
deprecated	Use setURL(URL, String, String, int, String, String, String, String);