Java Reference
In-Depth Information
CHAPTER 6
The URLName Class
javax.mail.URLName
treats a URL as a string, but does not attempt to connect to or
resolve any of the parts of the string. It's conceptually similar to
java.net.URI
but
predates it by several years.
URL names are mainly used as convenient ways to identify folders and stores with
nonstandard URLs (such as
pop3://elharo:mypassword@mail.ibiblio.org:110/INBOX
)
that don't have a matching protocol handler:
public
class
URLName
Object
The methods of
URLName
are very similar to those of
java.net.URL
, except that all those
involving actual connections have been deleted. What's left is a bunch of methods for
breaking a URL string into its component parts or building a URL from pieces.
The Constructors
There are three overloaded
URLName
constructors. One takes the individual pieces of a
URL as arguments, another takes a
java.net.URL
object, and a third takes a
String
containing a URL:
public
URLName
(
String
protocol
,
String
host
,
int
port
,
String
file
,
String
userName
,
String
password
)
public
URLName
(
URL
url
)
public
URLName
(
String
url
)
All the operations on the
URLName
take place with simple substring manipulation, al‐
lowing the
URLName
class to support nonstandard URLs such as pop3://eharold:pass‐
word@utopia.poly.edu/INBOX or imap://elharo@ibiblio.org/Speaking/SD2008West.
These
URLName
objects can be used to refer to particular folders on the server.
