Java and Electronic Mail - Java - page 692

does the rest. Very convenient! So convenient, in fact, that Mailer is part of the
com.darwinsys.util package.

For extra generality, the lists of To, CC, and BCC recipients can be set in one of three ways:

▪ By passing a string containing one or more recipients, such as “ian, robin”

▪ By passing a List containing all the recipients as strings

▪ By adding each recipient as a string

A “full” version allows the user to type the recipients, the subject, the text, and so on into a
GUI and have some control over the header fields. The MailComposeBean (in Program:
MailClient ) does all of these, using a Swing-based GUI. MailComposeBean uses this Mailer
class to interface with the JavaMail API. Example 17-4 contains the code for the Mailer
class.

Example 17-4. Mailer.java
package package com . darwinsys . mail ;

public

public class Mailer {

/** The javamail session object. */
protected

class Mailer

protected Session session ;
/** The sender's email address */
protected protected String from ;

/** The subject of the message. */
protected

protected String subject ;
/** The recipient ("To:"), as Strings. */
protected protected List < String > toList = new new ArrayList <>();

/** The CC list, as Strings. */
protected protected List < String > ccList = new new ArrayList < String >();

/** The BCC list, as Strings. */
protected protected List < String > bccList = new new ArrayList < String >();

/** The text of the message. */
protected protected String body ;

/** The SMTP relay host */
protected protected String mailHost ;

/** The verbosity setting */
protected

protected boolean boolean verbose ;

/** Get from */
public

public String getFrom () {
return return from ;

}