HW07-1 Create an SD diagram that will show the interaction between Simulator, Field, and a single Fox and a single Rabbit, based on your observations of runtime behavior and an examination of the source code for Foxes v-2. [Assume your single Fox instance can possibly eat your single Rabbit!] Diagram should use at least one Opt block and at least one Alt block. [Could also consider nested blocks!].
HW07-1 Create an SD diagram that will show the interaction between Simulator, Field, and a single Fox and a single Rabbit, based on your observations of runtime behavior and an examination of the source code for Foxes v-2. [Assume your single Fox instance can possibly eat your single Rabbit!] Diagram should use at least one Opt block and at least one Alt block. [Could also consider nested blocks!].
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
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Transcribed Image Text:4 #
Simulator.java X
10 import java.util.Random;
6
7 public class Simulator
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private static final int DEFAULT_WIDTH = 120;
private static final int DEFAULT_DEPTH = 80;
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private static final double FOX_CREATION_PROBABILITY = 0.02;
private static final double RABBIT_CREATION_PROBABILITY = 0.08;
private List<Animal> animals;
private Field field;
private int step;
private SimulatorView view;
public Simulator()
{this (DEFAULT_DEPTH, DEFAULT_WIDTH) ;
}
public Simulator(int depth, int width)
{
42
}
43
}
440 public void simulateOneStep()
{
step++;
// Provide space for newborn animals.
List<Animal> newAnimals = new ArrayList<>();
if(width <= 0 || depth <= 0) {
System.out.println("The dimensions must be greater than zero.");
System.out.println("Using default values.");
depth =DEFAULT_DEPTH;
DEFAULT_WIDTH; }
width =
animals = new ArrayList<>();
field = new Field (depth, width);
view = new SimulatorView(depth, width);
view.setColor (Rabbit.class, Color. ORANGE) ;
view.setColor(Fox.class, Color.BLUE);
reset();
}
public void runLongSimulation ()
{
simulate (4000);
}
public void simulate(int numSteps)
{
for(int step = 1; step <= numSteps && view.isViable(field); step++) {
simulateOneStep();
// Let all rabbits act.
for (Iterator<Animal> it = animals.iterator(); it.hasNext(); ) {
Animal animal = it.next();
animal.act(newAnimals);
if(! animal.isAlive()) {
it.remove();
}
}
animals.addAll(newAnimals);
view.showStatus(step, field);
}
public void reset()
{
step = 0;
animals.clear();
populate();
view.showStatus (step, field);
}
private void populate()
{
Random rand = Randomizer.getRandom();
field.clear();
for(int row = 0; row < field.getDepth(); row++) {
for(int col =
0; col < field.getWidth(); col++) {
}
}
if(rand.nextDouble() <= FOX_CREATION_PROBABILITY) {
Location location = new Location (row, col);
Fox fox = new Fox(true, field, location);
animals.add(fox);
}
else if(rand.nextDouble() <= RABBIT_CREATION_PROBABILITY) {
Location location = new Location (row, col);
Rabbit rabbit = new Rabbit(true, field, location);
animals.add(rabbit);
}
}
private void delay(int millisec)
{
try {
catch
}
Thread.sleep (millisec);
stodExcon
s
J Rabbit.java X
10 import java.util.List;
3 public class Rabbit extends Animal
4957WNTOSO LASSE
4 {
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58 }
private static final int BREEDING_AGE = 5;
private static final int MAX_AGE = 40;
private static final double BREEDING_PROBABILITY = 0.12;
private static final int MAX_LITTER_SIZE = 4;
Randomizer.getRandom();
private static final Random rand =
public Rabbit (boolean randomAge, Field field, Location location)
{
{
}
public void act (List<Animal> newRabbits)
}
super(field, location);
setAge(0);
if (randomAge) {
}
}
setAge(rand.nextInt (MAX_AGE));
incrementAge();
if(isAlive()) {
}
giveBirth(newRabbits);
}
private void giveBirth (List<Animal> newRabbits)
{
}
Location newLocation = getField().freeAdjacent Location (getLocatio
if(newLocation != null) {
setLocation (newLocation);
}
else {
}
setDead ();
}
}
protected int getBreeding Age() {
return BREEDING_AGE;
Field field
getField();
List<Location> free = field.getFreeAdjacent Locations (getLocation () );
int births = breed();
protected int getMaxAge() {
return MAX_AGE;
@Override
=
for(int b = 0; b < births && free.size() > 0; b++) {
Location loc = free.remove(0);
Rabbit young = new Rabbit(false, field, loc);
newRabbits.add(young);
OOPDA - Foxes_v3_copy/src/Fox.java - Eclipse IDE
protected double getBREEDING_PROBABILITY() {
return BREEDING_PROBABILITY;
protected int getMAX_LITTER_SIZE() {
return MAX_LITTER_SIZE;
Animal.java X
10 import java.util.List;
3456789OHATOONMANORA
4 public abstract class Animal
5 {
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return field;
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private boolean alive;
private Field field;
private Location location;
private int age;
private static final Random rand = Randomizer.getRandom();
public Animal(Field field, Location location)
{
alive = true;
this.field = field;
set Location (location);
age = 0;
}
88}
protected int getAge() {
return age;
}
protected void setAge(int newAge) {
age = newAge;
}
abstract public void act(List<Animal> newAnimals);
protected boolean is Alive ()
return alive;
{
}
protected void setDead()
{
alive = false;
if(location != null) {
}
{
}
protected Location getLocation()
return location;
}
protected void setLocation (Location newLocation)
{
if(location != null) {
}
}
field.clear(location);
location = null;
field = null;
}
}
field.clear(location);
}
location = newLocation;
field.place(this, newLocation);
abstract protected int getBreedingAge();
protected boolean canBreed() {
return getAge() >= getBreedingAge();
abstract protected int getMaxAge();
protected void incrementAge() {
setAge(getAge()+1);
if (getAge() > getMaxAge()) {
set Dead ();
}
abstract protected double getBREEDING_PROBABILITY();
abstract protected int getMAX_LITTER_SIZE();
}
protected int breed()
{
int births = 0;
if (canBreed() && rand.nextDouble() <= getBREEDING_PROBABILITY())
births = rand.nextInt (getMAX_LITTER_SIZE()) + 1;
}
return births;
Writable
Fox.java XJ Tester.java
{
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private static final int BREEDING_AGE = 15;
private static final int MAX_AGE = 150;
private static final double BREEDING_PROBABILITY = 0.08;
private static final int MAX_LITTER_SIZE = 2;
private static final int RABBIT_FOOD_VALUE = 9;
private static final Random rand = Randomizer.getRandom();
private int foodLevel;
public Fox (boolean randomAge, Field field, Location location)
{
super(field, location);
if (randomAge) {
setAge(rand.nextInt (MAX_AGE));
foodLevel = rand.nextInt (RABBIT_FOOD_VALUE);
}
else {
}
}
public void act(List<Animal> newFoxes)
{
setAge(0);
foodLevel = RABBIT_FOOD_VALUE;
incrementAge();
incrementHunger();
if(isAlive()) {
giveBirth(newFoxes);
Location newLocation = findFood ();
if (newLocation
null) {
newLocation = getField().freeAdjacent Location (get Location());
}
}
if(newLocation != null) {
}
set Location (newLocation);
}
else {
}
}
}
private void incrementHunger ()
{
foodLevel--
<=
if (foodLevel
setDead ();
}
}
private Location findFood ()
{
Field field = getField();
List<Location> adjacent = field.adjacent Locations (getLocation());
setDead ();
Iterator<Location> it = adjacent.iterator();
while(it.hasNext()) {
Location where = it.next();
Object animal = field.getObjectAt (where);
if(animal instanceof Rabbit) {
0) {
}
Rabbit rabbit = (Rabbit) animal;
if(rabbit.isAlive()) {
rabbit.setDead ();
}
}
return null;
}
private void giveBirth (List<Animal> newFoxes)
{
foodLevel = RABBIT_FOOD_VALUE;
return where;
Field field =
getField();
List<Location> free = field.getFreeAdjacent Locations (getLocation());
int births
= breed();
for(int b = 0; b < births && free.size() > 0; b++) {
Location loc = free.remove(0);
}
}
protected int get Breeding Age() {
return BREEDING_AGE;
Fox young = new Fox(false, field, loc);
newFoxes.add(young);
}
protected int getMaxAge() {
return MAX_AGE;
Smart Insert
}
protected double getBREEDING_PROBABILITY() {
return BREEDING_PROBABILITY;
protected int getMAX_LITTER_SIZE() {
return MAX_LITTER_SIZE;
89: 6:2671
a
m
M
![HW07-1 Create an SD diagram that will show the interaction between Simulator, Field, and a single Fox
and a single Rabbit, based on your observations of runtime behavior and an examination of the source
code for Foxes v-2. [Assume your single Fox instance can possibly eat your single Rabbit!] Diagram
should use at least one Opt block and at least one Alt block. [Could also consider nested blocks!].
Note: There may be 3-5 actors with timelines in your SD: AFox, ARabbit, theSimulator, and maybe ???
and ???. Try to show messages between the timelines. Example "setDead()-→"
Include a WORD document that describes your analysis for this, as well as the pdf for your diagram.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3199efa8-af35-43b1-95a6-3405e7d6b09b%2Fb1fe537e-1b49-43fe-a3d6-80993cee63fb%2Fxso7jq_processed.jpeg&w=3840&q=75)
Transcribed Image Text:HW07-1 Create an SD diagram that will show the interaction between Simulator, Field, and a single Fox
and a single Rabbit, based on your observations of runtime behavior and an examination of the source
code for Foxes v-2. [Assume your single Fox instance can possibly eat your single Rabbit!] Diagram
should use at least one Opt block and at least one Alt block. [Could also consider nested blocks!].
Note: There may be 3-5 actors with timelines in your SD: AFox, ARabbit, theSimulator, and maybe ???
and ???. Try to show messages between the timelines. Example "setDead()-→"
Include a WORD document that describes your analysis for this, as well as the pdf for your diagram.
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