Using Objects

Using Objects based on Existing Classes

• object orientation
• new
• dot operator
• using instance variables
• calling methods

BunnyHarness.java depends on a class Bunny.

Deitel Chapter 3

Classwork

Part A

Create a project and in it a class with a main, TwoAnimals.

☑  Copy my Bunny class and Cat class into your project.  Except for fixing the package statements you do not need to edit anything in these files to do this classwork.  In fact, reading them will probably just be confusing -- they have material we will cover later.  They are just there so you can use use Bunny and Cat objects your program 

 For information about the variables and methods in these classes look at Bunny Documentation and Cat Documentation

☑  In your main method:

• create a Bunny variable (remember to use "new").
• give the Bunny a name of your choosing
• print the Bunny (using println, like we print anything else), and then print just the Bunny's name
• make the Bunny hop
• feed the Bunny 3 carrots by calling the Bunny's feed method 3 times.
  • OR feed the Bunny 17 carrots by passing 17 to the Bunny's feed method (put it in the parens of the feed method, like passing a string you want to print to the println method)
• print the Bunny again, and then just the Bunny's carrotcount
• make the Bunny hop again

☑  Continuing in main  after the code you wrote earlier,

• create a Cat variable
• give the Cat a name of your choosing
• print the Cat
• make the Cat miaow
• feed the Bunny to the Cat by passing your Bunny variable to the Cat's eat method (put it in the parens of the eat method, like passing a string you want to print to the println method)
• print out the Bunny's name again (it will have been changed after being eaten)