Java Cookbook

Program: MailClient

This program is a simplistic GUI-based mail client. It uses the Swing GUI components (see Chapter 13) along with JavaMail. The program loads a Properties file (see Section 7.8) to decide what mail server to use for outgoing mail (see Section 19.3), as well as the name of a mail server for incoming mail and a Store class (see this chapter’s Introduction and Section 19.6). The main class, MailClient, is simply a JComponent with a JTabbedPane to let you switch between reading mail and sending mail.

When first started, the program behaves as a mail reader, as shown in Figure 19-2.

Figure 19-2. Mail Client in reading mode

You can click on the Sending tab to make it show the Mail Compose window, shown in Figure 19-3. I am typing a message to an ISP about some SPAM I received.

Figure 19-3. Mail Client in compose mode

The code is pretty simple; it uses the MailReaderBean presented earlier and a similar MailComposeBean for sending mail. Example 19-11 is the main program.

Example 19-11. MailClient.java

import com.darwinsys.util.FileProperties; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import java.util.*; /** Standalone MailClient GUI application. */ public class MailClient extends JComponent implements MailConstants { /** The quit ...