CSC 314: Programming in Java

Winter 2001

Individual Assignment 3

Currency Exchange: A Simple Graphical User Interface

Due Friday February 2 before 11:30pm

The Web is full of simple calculators and converters including those used for metric conversion, mortgage calculation and HTML color codes. For this assignment, you will introduce yet another such calculator. This product produces currency equivalents. For example, if a user wanted to know the equivalent in French francs for US$12, your product would allow the user to supply the figure and then display the amount in francs (approximately 84 francs).

The overall design is up to you, but it should at least follow these requirements:

• The interface should at least perform conversions of US dollars to one of 3 different currencies and from those currencies into dollars.
• Currency conversion factors should be declared as constants at the beginning of the class declaration. Later we'll learn how to access this information from a file, database or Web page.
• Use the swing components as discussed in class and in the Deitel and Deitel text.
• Call your public class Currency, which should extend the JFrame class, and place it in the file Currency.java.

Here are some tips for helping you complete this assignment:

• The temperature conversion interface (TempFrame.java) provides a good starting point for this assignment.
• Only buttons and text fields are needed to do a reasonable job, but you may use other graphical components if you choose.
• Use the flow layout manager and experiment with different frame sizes in order to obtain a reasonably looking interface.
• For this assignment, do not worry about handling invalid data from the user (e.g. letters instead of numbers). We will learn how to take care of invalid user input later.

Submission

Before the due date and time, you should submit the following file through the submission Web page:

• Your individual version of Currency.java

The grader will use this sheet for evaluating the asignment.