Object-oriented programming - Laboratory 5

Fifth Java program

Final code from classes

package com.company;

import java.util.Scanner;
import java.util.Random;

public class Main {

    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        Random rand = new Random();

        System.out.println(Person.getNumberOfPerson());

        Student[] st = new Student[3];

        st[0] = new Student("Rafal", rand.nextInt(100), 1);
        st[1] = new Student("Random", 44, 1);

        System.out.println("Give me the name of the student");
        String name = in.nextLine();
        System.out.println("Give me the student age");
        int age = Integer.parseInt(in.nextLine());
        System.out.println("Give me the student degree");
        int degree = Integer.parseInt(in.nextLine());

        st[2] = new Student(name, age, degree);

        coronavirus virus = new coronavirus();
        virus.affectPerson(st[rand.nextInt(3)]);
        virus.affectPerson(st[rand.nextInt(3)]);
        coronavirus virus2 = new coronavirus();

        System.out.println("Number of viruses: " + coronavirus.getNumberOfViruses());
        virus2 = null;
        System.gc();
        System.out.println("Number of viruses: " + coronavirus.getNumberOfViruses());
   }
}

package com.company;

public class Person
{
    protected final String name;
    protected int age;
    protected String accompanyingDisease;

    private static int numberOfPerson;
    static
    {
        numberOfPerson = 0;
    }
    public static int getNumberOfPerson()
    {
        return numberOfPerson;
    }

    public Person(String name, int age)
    {
        this.name = name;
        this.age = age;
        numberOfPerson++;
        System.out.println("You are the "+this.getNumberOfPerson()+" person in the system.");
    }

    public Person(String name, int age, String accompanyingDisease)
    {
        this(name, age);
        this.accompanyingDisease = accompanyingDisease;
    }

    public void presentYourself()
    {
        System.out.println("My name is "+this.name);
        System.out.println("I have "+this.age+" years old");
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

package com.company;

public class Student extends Person{
    private int studyDegree;
    static final String university = "UAM";

    public Student(String name, int age, int studyDegree)
    {
        super(name, age, "");
        this.studyDegree = studyDegree;
    }

    public void presentYourself()
    {
        super.presentYourself();
        System.out.println("My degree is "+studyDegree);
        System.out.println("I'm a student of "+ university);
    }

    public int getStudyDegree() {
        return studyDegree;
    }

    public void setStudyDegree(int studyDegree) {
        this.studyDegree = studyDegree;
    }
}

package com.company;

public class fluvirus extends virus
{
    private static int numberOfViruses;

    fluvirus()
    {
        numberOfViruses++;
    }

    public static int getNumberOfViruses()
    {
        return numberOfViruses;
    }
}

package com.company;

public class virus
{
    private Person affected;

    public void affectPerson(Person person)
    {
        this.affected = person;
    }

    protected void cleanup() {}

    public String whoIsAffectedName()
    {
        return affected.getName();
    }
}