Design antivirus e-mail programs in Java

You double-click the email from your friend. However, before you can read it, the virus program pops up a dialog box that tells you that the message contains a virus that is not able to clear the virus in the file, so it isolates the file so that you cannot access it.

If you are dissatisfied, call your friend and he sends you a message with a virus.

Your friend may not have sent you a virus intentionally. It is likely that your friend's computer has been infected by a virus that copies itself by sending a virus message to everyone in the e-mail address Book. Even the news from the most trusted friends is not believable.

Many e-mail clients display messages in a way that looks like the way directories on disk contain files. These emails allow you to organize messages by storing them in a folder (one of which is called an inbox). Figuratively speaking, each message is a separate file, and a folder or directory on the disk contains a set of related files.

But the appearance of many email clients can be misleading. Many e-mail client programs combine several groups of related messages into a single file. For example, Netscape Communicator does not have a folder called an Inbox on disk. In fact, it only has a file called the Inbox, and all the messages in your Inbox are in that file.

When configuring the "file system real-time protection" of the virus detection program, it has the following options:

The primary action when a virus is detected:

· To clear a virus in a file

· Isolate infected files

· Delete infected files

· Do not process (only record)

If the primary operation fails:

· Isolate infected files

· Delete an infected file

· Do not process (only record)