• This will be covered on Tuesday, February 25th. It is great preparation for the first exam, so study it BEFORE the Tuesday class.

• See the CoinPurseDemo2.java code. It is a driver and demo program for the Purse class, but it also illustrates many techniques on its own. It would be said to be a client of the Purse class.

• See the Purse.java file and the Java code for the Purse class, which has many more methods than the original version from Big Java textbook, pages 90-92.

1. Try 8 dimes and 8 nickels and 0 quarters (no quarters). Is there something strange about the reported Totals (Click the Totals YELLOW button).

2. How was the 3D or the shadow effect created for the four round buttons? Look at the code to see how it was done.

3. Did you try all SIX different command buttons that are available in the GUI user interface? One of the command buttons is a little less obvious than the other five are.

4. More later... Please study this carefully! Count the local variables, parameters and PIVs in the two classes Purse and CoinPurseDemo2. Remember, PIV is my acronym for Private Instance Variables.