URLs and URIs - Java Network Programming - page 166

okButton . addActionListener ( al );
usernameField . addActionListener ( al );
passwordField . addActionListener ( al );
cancelButton . addActionListener ( new CancelResponse ());
}
private void show () {
String prompt = this . getRequestingPrompt ();
if ( prompt == null ) {
String site = this . getRequestingSite (). getHostName ();
String protocol = this . getRequestingProtocol ();
int port = this . getRequestingPort ();
if ( site != null & protocol != null ) {
prompt = protocol + "://" + site ;
if ( port > 0 ) prompt += ":" + port ;
} else {
prompt = "" ;
}
}
mainLabel . setText ( "Please enter username and password for "
+ prompt + ": " );
passwordDialog . pack ();
passwordDialog . setVisible ( true );
}
PasswordAuthentication response = null ;
class OKResponse implements ActionListener {
@Override
public void actionPerformed ( ActionEvent e ) {
passwordDialog . setVisible ( false );
// The password is returned as an array of
// chars for security reasons.
char [] password = passwordField . getPassword ();
String username = usernameField . getText ();
// Erase the password in case this is used again.
passwordField . setText ( "" );
response = new PasswordAuthentication ( username , password );
}
}
class CancelResponse implements ActionListener {
@Override
public void actionPerformed ( ActionEvent e ) {
passwordDialog . setVisible ( false );
// Erase the password in case this is used again.
passwordField . setText ( "" );
response = null ;
}
}