Provides the default equals calculation.

  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.
Returns: true if the two urls are considered equal, ie. they refer to the same fragment in the same file.
Parameters:
- u1 - a URL object
- u2 - a URL object
Since: 1.3

  Returns the default port for a URL parsed by this handler.

  Returns the default port for a URL parsed by this handler. This method
is meant to be overidden by handlers with default port numbers.
Returns: the default port for a URL parsed by this handler.
Since: 1.3

  Get the IP address of our host.

  Get the IP address of our host. An empty host field or a DNS failure
will result in a null return.
Returns: an InetAddress representing the host IP address.
Parameters:
- u - a URL object
Since: 1.3

  Provides the default hash calculation.

  Provides the default hash calculation. May be overidden by handlers for
other protocols that have different requirements for hashCode
calculation.
Returns: an int suitable for hash table indexing
Parameters:
- u - a URL object
Since: 1.3

  Compares the host components of two URLs.

  Compares the host components of two URLs.
Returns: true if and only if they are equal, false otherwise.
Parameters:
- u1 - the URL of the first host to compare
- u2 - the URL of the second host to compare
Since: 1.3

  Opens a connection to the object referenced by the URL argument.

  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.
Returns: a URLConnection object for the URL.
Parameters:
- u - the URL that this connects to.
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.

  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.
Returns: a URLConnection object for the URL.
Parameters:
- 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.
Throws:
- IOException - if an I/O error occurs while opening the connection.
- IllegalArgumentException - if either u or p is null, or p has the wrong type.
- 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.

  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.
Parameters:
- 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.

  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.
Returns: true if u1 and u2 refer to the same file
Parameters:
- u1 - a URL object
- u2 - a URL object
Since: 1.3

  Sets the fields of the URL argument to the indicated values.

  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.
Parameters:
- 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

  Sets the fields of the URL argument to the indicated values.

  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.
Parameters:
- 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: URL.set(java.lang.String, java.lang.String, int, java.lang.String, java.lang.String),

  Converts a URL of a specific protocol to a String.

  Converts a URL of a specific protocol to a
String.
Returns: a string representation of the URL argument.
Parameters:
- u - the URL.