Unit 5 Chapter 14 Assignment complete solutions correct answers key

Unit 5 Chapter 14 Assignment complete solutions correct answers key

Unit 5 Chapter 14 Assignment

Grading Information: This Program is due on Date Specified.

Comments are REQUIRED; flow charts and pseudocode are NOT REQUIRED.

Directions Points

The files must be called <LiFiUnit5Ch14.java> (driver program)

LiFiAnimal.java

LiFiFox.java (which extends LiFiAnimal)

LiFiChicken.java (which extends LiFiAnimal)

The files must be called as specified above, (LiFi = Your Last Initial Your First Initial)

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.

Only submit the .java files needed to make the program run. Do not submit the

.class files or any other files.

5%

Style Components

Include properly formatted prologue, comments, indenting, and other style elements

as shown in Chapter 2 starting page 64 and Appendix 5 page 881-892.

5%

Topics covered in chapter

Topics with * are covered in this assignment.

*Object class

*equals method

toString method

*Polymorphism

Abstract

*Interfaces

Protected access modifier

Basic Requirements

Write a program that simulates the battle between a fox and chickens.

Use this class hierarchy:

Fox

􀁸 Kills 1 chicken a day

20%

􀁸 Does not reproduce

Chicken

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

􀁸 Reproduction only happens when chickens are over 1 and 1 of each sex is

present

Simulation Control

􀁸 Simulation continues as long as chicken population is greater than 1 and less

than or equal 10

􀁸 (if 1 or less, mating can’t happen. If > 10, chickens will overrun the fox)

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

output piece and replacing LiFi with your initials. Add prologue and additional

comments to explain functionality.)

import java.util.ArrayList;

public class LiFiUnit5Ch14

{

public static void main(String [] args)

{

for(int count=0; count<10; count++)

{

LiFiFox foxy = new LiFiFox();

ArrayList< LiFiChicken > chickens = new

ArrayList<LiFiChicken>();

chickens.clearn();

chickens.add(new LiFiChicken());

chickens.add(new LiFiChicken ());

chickens.add(new LiFiChicken ());

chickens.get(0).setSex(true);

chickens.get(1).setSex(false);

chickens.get(2).setSex(false);

while (chickens.size() >1 && chickens.size() < 10)

{

for (LiFiChicken c:chickens)

c.grow();

foxy.grow();

LiFiChicken.mate(chickens);

foxy.eat(chickens);

}

//INCLUDE CODE FOR OUTPUT HERE.

}

}

Output code should output:

Depending on if the population of chickens is less than 1 and greater than or equal

10:

Chickens win - Chicken Population: ## (integer value)

or

Fox wins - Fox Weight (in chickens): ##.## (double value, 2 decimal places)

Output should repeat 10 times.

See sample output below.

LiFiAnimal.java

Instance variables:

name (string)

age (integer)

weight (double)

isMale (Boolean)

LiFiAnimal constructor : (default constructor)

Set age to 1.

grow method :

Increases age of LiFiAnimal by 1.

Accessor / mutator methods for each instance variable above:

Set or returns values as appropriate for data type specified.

10%

LiFiFox.java class

eat method: (receive chickens arraylist as argument)

Randomly removes a chicken from the population 70% of the time and increases

fox weight by the chosen chicken weight. Only increase weight if chicken is

30%

removed/eaten.

grow method:

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

LiFiChicken.java class

LiFiChicken 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 chicken by 1 and weight of chicken by 1% of current weight.

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

Randomly choose 2 chicken objects from arraylist and if conditions are correct,

proceed with mating.

Successful mating conditions are:

􀁸 1 male and 1 female chicken

􀁸 Both chickens older than 1 day

􀂃 If successful mating, randomly create between 0-4 chickens and

append to arraylist received as argument

30%

NOTE: Complete your activity and submit it by clicking “Submit Assignment”

Total Percentage 100%

Sample

Your output will vary based on the random numbers generated.

Sample session (requires no user input):