/** Creates a new SipURL */
public SipURL(String hostname, int portnumber) {
init(null, hostname, portnumber);
}
/** Creates a new SipURL */
public SipURL(String username, String hostname, int portnumber) {
init(username, hostname, portnumber);
}
/** Creates a new SipURL */
public SipURL(String username, String hostname) {
init(username, hostname, -1);
}