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Human.java
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Human.java
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import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class Human {
// Human instance Variables
public String name;
private int age;
private final int startingAge;
public int health;
public String ethnicity;
public String gender;
public Human spouse;
public LinkedList<Human> children;
public LinkedList<Human> friends;
public boolean employed;
public int salary;
// Constants and variables used within the class
private Random rand;
private static final double AGE_PROBABILTY = 0.5;
private static final double ETHNICITY_PROBABILITY = 0.2;
private static final double GAY_MARRAGE_PROBABILITY = 0.03;
private static final double STRAIGHT_MARRAGE_PROBABILITY = 0.10;
private static final double BASE_FRIENDSHIP_PROBABILTY = 0.75;
private static final int AGE_HEALTH_THRESHOLD = 40;
private static final ArrayList<String> randNames = getRandomPeople();
/**
* Initialize the instance variables for a human
*/
public Human(String name, int age, String ethnicity, String gender,
int salary) {
this.name = name;
this.startingAge = this.age = age;
health = 1;
this.ethnicity = ethnicity;
this.gender = gender;
spouse = null;
children = new LinkedList<Human>();
friends = new LinkedList<Human>();
this.salary = salary;
employed = salary > 0 ? true : false;
rand = new Random();
rand.setSeed(System.currentTimeMillis());
}
public Human(String name, int age, String ethnicity, String gender,
int salary, long seed) {
this(name, age, ethnicity, gender, salary);
rand.setSeed(seed);
}
private static ArrayList<String> getRandomPeople() {
ArrayList<String> lines = null;
try {
FileReader fileReader = new FileReader("names.txt");
BufferedReader bufferedReader = new BufferedReader(fileReader);
lines = new ArrayList<String>();
String line = null;
while ((line = bufferedReader.readLine()) != null) {
lines.add(line);
}
bufferedReader.close();
} catch (IOException e) {
e.printStackTrace();
System.exit(1);
}
return lines;
}
public int updateAge() {
return age = Simulator.currentYear - Simulator.startYear + startingAge;
}
public String introduce() {
return "Hi, my name is " + name + " and I'm " + age + " years old";
}
public String marry(Human toWed) {
if (age < 18 || toWed.age < 18) {
return (age < 18 ? name : toWed.name) +
" is too young to be married";
} else if (toWed.name.equals(name)) {
return name + " is trying to marry " +
(gender.equals("male") ? "himself" : "herself") +
"!! Unfortunatly, " +
(gender.equals("male") ? "he" : "she") + " is still single";
} else if (spouse == null && toWed.spouse == null) {
spouse = toWed;
toWed.spouse = this;
return name + " and " + spouse.name + " are now married";
} else {
return (spouse != null ? name : toWed.name) + " is already married";
}
}
public String divorce() {
if (spouse != null) {
String ret;
ret = name + " and " + spouse.name + " divorced";
spouse.spouse = null;
spouse = null;
return ret;
} else {
return name + " isn't even married";
}
}
// assumes giveBirth is called with a married Human
public String giveBirth(Human baby, ArrayList<Human> kids) {
if (!gender.equals("female")) {
return name + " has to be a female to give birth";
}
if (!spouse.gender.equals("male")) {
return name + " can only give birth if her spouse is a male";
}
children.add(baby);
spouse.children.add(baby);
kids.add(baby);
return name + " and " + spouse.name + " gave birth to a baby named " +
baby.name;
}
public String getJob(int money) {
if (employed != true) {
employed = true;
salary = money;
return name + " found a job that is paying " +
(gender.equals("male") ? "him" : "her") + " " +
salary + " per year";
} else {
return name + " already has a job";
}
}
public String leaveJob() {
if (employed == true) {
employed = false;
salary = 0;
return name + " has left " +
(gender.equals("male") ? "his" : "her") + " job";
} else {
return name + " does not have a job " +
(gender.equals("male") ? "he" : "she") + " can leave";
}
}
private int ageDiff(int otherAge) {
return otherAge >= age ? otherAge - age : age - otherAge;
}
private String makeNewFriend(Human newFriend) {
friends.add(newFriend);
newFriend.friends.add(this);
return name + " is now friends with " + newFriend.name;
}
public String spendTimeWith(Human otherPerson) {
if (otherPerson.name.equals(this.name)) {
return name + " spent the year by themselves";
} else if (friends.contains(otherPerson)) {
return name + " had a great time hanging out with their friend " + otherPerson.name;
} else {
// possibly make a friend!!
double chanceOfBeingFriends = BASE_FRIENDSHIP_PROBABILTY;
// for every year you differ in age you decrease your chances of being friends by 10%
chanceOfBeingFriends -= AGE_PROBABILTY * ageDiff(otherPerson.age);
// if you are a different ethnicity you decrease your changce of being friends by 30%
int sameNationality = ethnicity.equals(otherPerson.ethnicity) ? 0 : 1;
chanceOfBeingFriends -= ETHNICITY_PROBABILITY * sameNationality;
if (rand.nextDouble() <= chanceOfBeingFriends) {
return makeNewFriend(otherPerson);
} else {
return name + " did not become friends with " + otherPerson.name +
" after spending a year together :(";
}
}
}
public String pursueMarrage() {
Human potentialSpouse;
if (friends.size() > 0) {
potentialSpouse = friends.get(rand.nextInt(friends.size()));
if (potentialSpouse.gender.equals(gender)) {
// see if a gay marrage could happen
if (rand.nextDouble() < GAY_MARRAGE_PROBABILITY)
return marry(potentialSpouse);
} else {
// see if a straight marrage will happen
if (rand.nextDouble() < STRAIGHT_MARRAGE_PROBABILITY)
return marry(friends.get(rand.nextInt(friends.size())));
}
return name + " proposed to " + potentialSpouse.name + " but was rejected :(";
} else {
return name + " needs to make friends first before concidering marrage";
}
}
private static double fertilityProbability(int wifes_age) {
return -0.0016 * wifes_age * wifes_age + 0.0754 * wifes_age + 0.0352;
}
public String tryForKids(ArrayList<Human> listOfNewChildren) {
if (spouse == null) {
return name + " needs to be married to give birth";
}
Human wife = gender.equals("male") ? spouse : this;
if (rand.nextDouble() < fertilityProbability(wife.age)) {
String childsGender = rand.nextBoolean() ? "male" : "female";
Human newChild = new Human(randNames.get(rand.nextInt(randNames.size())),
0, ethnicity, childsGender, 0);
return wife.giveBirth(newChild, listOfNewChildren);
} else {
return name + " was not able to have kids";
}
}
public String checkVitals(ArrayList<Human> deceased) {
updateAge();
int ageThresholdReached = (age >= AGE_HEALTH_THRESHOLD ? -1 : 1);
health += (rand.nextInt(3) + 1) * ageThresholdReached;
if (health < 0) {
deceased.add(this);
return "Unfortunatly " + name + " has passed away at age " + age;
} else {
if (age >= AGE_HEALTH_THRESHOLD) {
return name + "'s health is declining. Life expectancy: " + health + "-" + health*3 + " years";
} else {
return name + "'s health is getting stronger every year!";
}
}
}
}