- Red, White, and Blue (10 points)
Problem 6.16 (p 471): Write the code for an applet that
has three buttons labeled, Red, White, and
Blue. When a button is clicked, the background of
the applet changes to the color named on the button.
- Light (10 points)
Problem 6.17 (p 471): Create an applet Light that
simulates a simple light. Create one button labeled On/Off.
As you click this button, the background color will change between
DARK_GRAY and YELLOW.
- Inventory (20 points)
Write a class Item that stores information about an object in a store. It should
have variables for:
- the name of the item
- the full price of the item
- the sales price of the item
Each price of the item should be stored as a double.
Write two constructors for this class: one which has the name of the item, the full price,
and the sales price as parameters, and one which only has the name of the item and the full
price as parameters. In the second case, the sales price should be set to half the full price.
Write a static method called format which takes a double as its parameter
and returns a string representing the double as a price. Specifically, put a $ in front of
the double value, and truncate (or round) the value to have exactly 2 decimal places.
If the double value is less than 0, return $0.00. If the double value only has one decimal
place, add a 0 at the end (ex. 6.7 becomes $6.70)
Write a method toString() which displays information about the item in the following
Item: item_name Full price: formatted_full_price Sales price: formatted_sales_price
where formatted_full_price is the full price of the item, formatted by calling the method
format on it, and formatted_sales_price is the sale the sales price of the item,
formatted by calling the method format on it.
Write a driver program that instantiates several objects of type Item and demonstrates the class.
It should test the method format by calling it on at least 3 different cases of doubles.
Submitting Your Problem Set
You should submit all problems for grading by
the deadline (see class schedule for date). To submit a program,
you need to demonstrate (during office hours or lab) your program
and explain how it works.