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, allowing the URLName
class to support nonstandard URLs such as pop3://eharold:password@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.
Parsing Methods
These seven getter methods are the main purpose for this class. They return individual pieces of the URL:
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