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ATLProg, Software Engineer
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The file must be called <> (driver program) (which extends Mammal) (which extends Mammal)

Ensure you include ALL files required to make your program compile and run.
I would like to see your .java files only.

If possible, submit all programs as a single .zip file (not required)

Proper coding conventions required the first letter of the class start with a capital letter and the first letter of each additional word start with a capital letter


Overall Requirements

Write a program that simulates the battle between a cat and mice.


Use this class hierarchy:



  • Kills 1 mouse a day

  • Does not reproduce



  • Have a chance to reproduce as long as conditions are met

  • Reproduction only happens when mice are over 1 and 1 of each sex is present


Simulation Control

  • Simulation continues as long as population is greater than 1 and less than 10


Driver main method should be as shown below: (replacing comment with missing piece)


import java.util.ArrayList;

public class LastFirstWeek5CatMouse
     public static void main(String [] args)

          Cat sylvester = new Cat();
          ArrayList mice = new ArrayList();
          mice.add(new Mouse());
          mice.add(new Mouse());
          mice.add(new Mouse());

          while (mice.size() >1 && mice.size() < 10)
              for (Mouse m:mice)

Output code should output:

Depending on if the population of mice is greater than or equal 10:

Mice RULE, Cats Drool Mice Population: ## (integer value)
Cats RULE, Mice Drool Cat Weight (in mice): ##.## (double value, 2 decimal places)

Output should output results 10 times. Modification of or before while loop may be required. See sample output below.


15% class

Instance variables:

name (string)
age (integer)
weight (double)
isMale (Boolean)

Mammal constructor : (default constructor)

Set age to 1.


grow method :

Increases age of mammal by 1.


Accessor / mutator methods for each instance variable above:

Set or returns values as appropriate for data type specified.


10% class

eat method: (receive mouse arraylist as argument)

Randomly removes a mouse from the population 70% of the time and increases cat weight by the chosen mouse weight. Only increase weight if mouse is removed/eaten. (See chapter 5, lottery example, for random example)

grow method:

Set the cats age to the current age plus 1. (use accessor/mutator methods)


30% class

Mouse constructor: (default constructor)

Randomly choose sex and assign to isMale as appropriate.

Set age to 1.

Set weight to 1.


grow method:

Increase age of mouse by 1 and weight of mouse by 1% of current weight.


mate method: (static method, receive mouse arraylist as argument)

Randomly choose 2 mice objects from arraylist and if conditions are correct, proceed with mating.

Successful mating conditions are:

  • 1 male, 1 female mouse

  • Both mice older than 1 day

If successful mating, randomly create between 0-4 mice and append to arraylist received as argument.




Sample session (requires no user input):

Mice RULE, Cats Drool Mice Population: 11
Cats RULE, Mice Drool Cat Weight (in mice): 2.03
Mice RULE, Cats Drool Mice Population: 10
Cats RULE, Mice Drool Cat Weight (in mice): 2.05

Press any key to continue . . .


As always, you should:

  • Limit your use of class variables and instance variables – only use them if appropriate.

  • Use appropriate modifiers for your methods. The modifiers we’ve discussed are private, public, static, and final.

  • Use helper methods if appropriate.

  • Follow the Java Coding Styles Document including comments and style

  • Mimic the sample session precisely. 

Hi,How soon is this needed?
Customer: replied 3 years ago.

Answer requested within next 24 hours.


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Customer: replied 3 years ago.

Answer is good to go thank you.

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