java ReadMailDemo protocol myserver myusername mypassword in Java

Maker Code 39 Extended in Java java ReadMailDemo protocol myserver myusername mypassword
java ReadMailDemo protocol myserver myusername mypassword
Creating Code 3/9 In Java
Using Barcode creator for Java Control to generate, create Code 39 image in Java applications.
For example:
Create Bar Code In Java
Using Barcode generation for Java Control to generate, create barcode image in Java applications.
java ReadMailDemo pop3 ficticiousemailservercom johndoe xxm312ras
Barcode Recognizer In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
135 Advanced Messaging with JavaMail
Draw Code39 In Visual C#.NET
Using Barcode drawer for .NET framework Control to generate, create Code 39 Extended image in .NET applications.
The examples up until now have been pretty straightforward They only scratch the surface of JavaMail, however Simple tasks are easy to perform in JavaMail, but more advanced functionality is available Let's take a further look at what JavaMail has to offer
Create Code 39 Extended In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
1351 JavaMail Event-Handling Model
Make Code39 In .NET Framework
Using Barcode generation for .NET Control to generate, create ANSI/AIM Code 39 image in VS .NET applications.
The JavaMail API uses the JDK11 event-handling model, which readers may already be familiar with from using the Abstract Windowing Toolkit (AWT) and Swing For those without prior experience with this model, a brief over view is offered Readers acquainted with this material may choose to skip to Section 13512 13511 Overview AWT event handling in JDK102 used a clumsy callback mechanism that required developers to extend a Component and provide event-handling methods, or to provide these methods in a parent container such as an applet As of JDK11, this model has been replaced with a far superior mechanism The new event-handling model requires objects that are interested in observing events to register with the event source as a listener (see Figure 13-2) Each type of listener defines a set of methods that define event handlers When an event is generated by the event source, one of these handler methods will be called, for every registered listener This model allows multiple listeners for a given event source, as well as multiple types of event listeners Other listeners will be notified independently of each other; one listener cannot block the notification of another Figure 13-2 Event-handling overview
Code-39 Drawer In VB.NET
Using Barcode creation for .NET framework Control to generate, create USS Code 39 image in .NET framework applications.
Let's look at a brief example of this event-handling mechanism in action For example, suppose an application wanted to terminate when a button was pressed Rather than subclassing the button to provide event methods, the application can implement the appropriate listener interface and register with the button
Making GS1 - 13 In Java
Using Barcode generation for Java Control to generate, create EAN-13 image in Java applications.
public class myapp implements ActionListener { public myapp() { Button b = new Button("Exit"); baddActionListener(this) } public void actionPerformed(ActionEvent e) { Systemexit(0); } }
Drawing Bar Code In Java
Using Barcode maker for Java Control to generate, create barcode image in Java applications.
In this example, which uses ActionListener, only one event callback method was required However, more complex event listeners require many methods If you only want to implement one or a few of the methods of an event listener, there is usually a listener adapter class provided An adapter class implements every method you need for a listener interface, and by overriding individual methods you can save yourself a considerable amount of time and effort Inner classes are another way of working with short event handlers An inner class is a class within a class If you frequently write event listeners that use adapters, you'll find that you often need to create new Java source files, which can become difficult to manage Inner classes are a language feature of JDK11 and higher A thorough discussion of Java language features is beyond the scope of this book However, examples using inner classes for event handling can be found later in the chapter 13512 JavaMail Events Several JavaMail events are defined in the javaxmailevent package The event classname, its corresponding description, and the usual sources of the event are shown in Table 13-1 Each event can be responded to by implementing the appropriate event listener classes There are six listener classes, and some support adapters that are useful when a single event action, or a few event actions, must be monitored
ECC200 Printer In Java
Using Barcode generation for Java Control to generate, create DataMatrix image in Java applications.
1 ConnectionListener listener interface for ConnectionEvent o ConnectionAdapter adapter for ConnectionListener 2 FolderListener listener interface for FolderEvent o FolderAdapter adapter for FolderListener 3 MessageChangedListener listener interface for MessageChangedEvent o MessageChangedAdapter adapter for MessageChangedListener 4 MessageCountListener listener interface for MessageCountEvent 5 StoreListener listener interface for StoreEvent 6 TransportListener listener interface for TransportEvent o TransportAdapter adapter for TransportListener
Print ANSI/AIM Code 39 In Java
Using Barcode creator for Java Control to generate, create Code39 image in Java applications.
1352 Writing JavaMail Event Handlers
Generating Barcode In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
Let's look at a practical example of JavaMail event handlers Earlier in this chapter, we looked at how to send a simple message using the Transport class However, other than catching exceptions thrown at runtime, there wasn't any strong error-handling code For example, the message might not have been delivered if the SMTP server rejected the recipient or IP address of the sender The earlier example has been rewritten to illustrate the JavaMail event-handling mechanism It registers a ConnectionListener and a TransportListener, to detect connection and transport events While some of the code is the same, changed portions are described below Code for SendEventDemo
Encode Code11 In Java
Using Barcode printer for Java Control to generate, create USD8 image in Java applications.
import import import import javaxmail*; javaxmailevent*; javaxmailinternet*; javautilProperties;
Bar Code Creation In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create barcode image in ASP.NET applications.
// 13, Listing 4 public class SendEventDemo {
Barcode Printer In VS .NET
Using Barcode creator for .NET framework Control to generate, create bar code image in .NET applications.
Table 13-1 Events Defined by the javaxmail Package Event Class Event Description Source MailEvent Represents general mail events Any ConnectionEvent Connection and disconnection events Store/Transport FolderEvent Represents a folder-related event Folder MessageChanged Represents change to messages Folder MessageCountEvent Represents a change in the number of messages Folder StoreEvent Represents an event pertaining to a mail service Store TransportEvent Represents a message transport event Transport
Barcode Creator In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create barcode image in ASP.NET applications.
public static void main(String args[]) { int argc = argslength; // Check for valid number of parameters if (argc != 2) { Systemoutprintln ("Syntax :"); Systemoutprintln ("java SendEventMailDemo smtphost to_address"); return; } String host = args[0]; String to = args[1];
Bar Code Generator In VS .NET
Using Barcode creation for .NET framework Control to generate, create bar code image in VS .NET applications.
// Create a properties file, specifying mail settings Properties prop = new Properties(); propput ("mailtransportdefault", "smtp"); propput ("mailsmtphost", host); try { // Get a session, with the specified properties Session mySession = SessiongetInstance (prop, null); // Create a message to send, specifying our session Message message = new MimeMessage (mySession); messagesetSubject ("Test message"); messagesetContent ("This is a test message", "text/plain"); // Create an InternetAddress, for specifying recipient InternetAddress toAddr = new InternetAddress ( to ); messagesetRecipient (MessageRecipientTypeTO, toAddr); // Create an InternetAddress, for specifying sender address InternetAddress fromAddr= new InternetAddress ( "nobody@nowherecom", "SendEventMailDemo" ); messagesetFrom (fromAddr); // Get a transport instance Transport transport = mySessiongetTransport(toAddr); // Create an anonymous inner class for connection listener transportaddConnectionListener( new ConnectionListener() { public void opened(ConnectionEvent e) { Systemoutprintln ("connection opened"); } public void disconnected(ConnectionEvent e) { Systemoutprintln ("connection disconnected"); } public void closed(ConnectionEvent e) { Systemoutprintln ("connection closed"); } }); // Create an anonymous inner class for transport listener transportaddTransportListener( new TransportAdapter() { public void messageDelivered(TransportEvent e) { Systemoutprintln ("Message delivered");
Code-39 Generation In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
} public void messageNotDelivered(TransportEvent e) { Systemoutprintln ("Message not delivered"); } }); // Open the connection transportconnect(); Systemoutprintln ("Attempting to send message"); // Send the message Address[] msgAddr = { toAddr } ; transportsendMessage(message, msgAddr); // Close the connection transportclose(); } catch (AddressException ae) { Systemerrprintln ("Invalid address " + ae); } catch (MessagingException me) { Systemerrprintln ("Messaging failure : " + me); } catch (Exception ex) { Systemerrprintln ("Failure : " + ex); } } }
UCC - 12 Creator In .NET
Using Barcode creator for Visual Studio .NET Control to generate, create GTIN - 12 image in VS .NET applications.
How SendEventDemo Works The first major difference is that we need to get an instance of a Transport object While Transport has a static method that allows messages to be sent, you will need an instance of Transport to register a ConnectionListener or TransportListener
Creating Bar Code In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.
// Get a transport instance Transport transport = mySessiongetTransport(toAddr);
Next, we have to create a listener and register it with our transport object In this example, anonymous inner classes are used, though it is also possible to create separate classes for this purpose An application could implement a Listener interface, or extend an Adapter class if not every listener method was required To illustrate the difference, both approaches have been used
// Create an anonymous inner class for connection listener transportaddConnectionListener( new ConnectionListener() { public void opened(ConnectionEvent e) { Systemoutprintln ("connection opened"); }
public void disconnected(ConnectionEvent e) { Systemoutprintln ("connection disconnected"); } public void closed(ConnectionEvent e) { Systemoutprintln ("connection closed"); } }); // Create an anonymous inner class for transport listener transportaddTransportListener( new TransportAdapter() { public void messageDelivered(TransportEvent e) { Systemoutprintln ("Message delivered"); } public void messageNotDelivered(TransportEvent e) { Systemoutprintln ("Message not delivered"); } });
When the listeners are registered, you can then work with the Trans port object The first step is to open a connection to the remote transport, by calling the Transportconnect() method This will trigger the registered ConnectionListener, as a connection will be established
// Open the connection transportconnect();
Once connected, the message can be sent The static Transportsend() method can't be used, as our listeners are registered with another Transport object instance Instead, the sendMessage() method must be used, which takes as a parameter an array of Address objects This will trigger a TransportEvent, which will be passed to the registered listener
// Send the message Address[] msgAddr = { toAddr } ; transportsendMessage(message, msgAddr);
Finally, the transport must be closed down When closed, a Connection Event will be passed to our listener
// Close the connection transportclose();
Running SendEventDemo As in the earlier SendMailDemo, the hostname of an SMTP server must be specified as a parameter, as well as a valid e-mail address The syntax for the SendEventDemo is as follows: