Fantasy Food Class

CS 160 In-Lab 3
September 17, 2007

The purpose of this laboratory is to make sure that you can create and use a simple class within the BlueJ environment.

Problem Description

Activate the BlueJ environment. Within the environment, create a new project called inlab3. Add a new class to the project called Food. The Food class should contain the following information.
  1. An instance variable called name that can store the name of the food.
  2. An instance variable called calories that can store the amount of a calories.
  3. A constructor that takes no parameters. The constructor should set the name of the food to "unknown" and the amount of calories to 0.
  4. A method called setName that takes a String parameter. The method should assign the value of the parameter to the name instance variable.
  5. A method called setCalories that takes an integer parameter. The method should assign the value of the parameter to the calories instance variable.
  6. A method called print that prints out both the name and calories in a readable format.

Creating Instances by Hand

Once the above Food class is finished, create two instances manually (by right clicking on the class). Call the first instance food1 and fill in the name with doughnuts and the calories to 5. Call the second instance food2 and fill in the name with rice cake and the calories with 488. (It's a fantasy program).

Once the two instances are created, call over either your lab TA or a consultant. He will call the print method on each of the two instances to see whether everything has been set up correctly. He or she will record whether you have done this part correctly.

Creating Instances by Code

Add another class to the project called Driver. Fill in the public static void main method with code so that it (1) creates the doughnut instance above and prints it and (2) creates the rice cake instance above and prints it.

When you are finished with this part, submit it to your lab TA before you leave.

Before Leaving Lab

Delete your inlab3 project so that students in the next lab section will not have a head start on the assignment. Remember to empty the recycle bin, too. Thanks!