Spam (or junk e-mail) costs U.S. organizations billions of dollars a year in spam-prevention software, equipment, network resources, bandwidth, and lost productivity. In this exercise, you will be doing your part to help identify the likelihood that a given message is spam by assigning a spam score to a message entered by the user.
1. Create a graphical interface that looks similar to the one shown in Figure 1 below.
Figure 1. Graphical User Interface for Exercise 1: see image.
2. Table 1 below provides a list of 30 words or phrases that commonly occur in spam messages (this list is far from exhaustive). Write an application in which the user enters an email message into a JTextArea. When the user clicks the verify button, your application must scan the message for each of the 30 keywords or phrases. For each occurrence of one of these within the message, add a point to the message's "spam score."
| As seen on | Buy | Meet singles | Extra income | Million dollars | Save big money |
| Opportunity | Cash | No fees | Online degree | Work at home | Additional income |
| Eliminate debt | Lower interest rate | Pre-approved | Consolidate your debt | Avoid bankruptcy | Miracle |
| Satisfaction | Risk free | Free hosting | You have been selected | Weekend getaway | You're a winner! |
| Offer | Unlimited | No obligation | Trial | Guarantee | No purchase necessary |
Table 1. Commonly occurring spam words and phrases
3. After calculating the spam score of the message, the application will display the spam score to the user via a message box, similar to that shown in Figure 2.
Figure 2. Message box displaying the spam score: see image.
4. When the user clicks the Clear button, erase the contents of the JTextArea box (i.e., set the text property to an empty string).