COMP 1409 | Lab04

Person.class

/**
 * Class to model a Person
 * 
 * Lab 4
 * 
 * @author Chad
 * @version 1.3
 */
public class Person
{
    private String firstName = "John";
    private String lastName = "Doe";
    private int age = 1;
    private double height = 150.0;

    public static final int MAX_HEIGHT = 200;
    public static final double MAX_AGE = 100;

    private static int counter = 0;

    /**
     * Default constructor.
     */
    public Person()
    {
        counter++;
    }
    
    /**
     * Constructor for creating a Person instance with just first name and last name.
     * 
     * @param _firstName The first name of our Person
     * @param _lastName  The first last of our Person
     */
    public Person(String _firstName, String _lastName)
    {
        setFirstName(_firstName);
        setLastName(_lastName);

        counter++;   
    }

    /**
     * Constructor for creating a Person instance.
     *
     * @param _firstName The first name of our Person
     * @param _lastName  The last name of our Person
     * @param _age       The age of our Person
     * @param _height    The height of our Person
     */
    public Person(String _firstName, String _lastName, int _age, double _height)
    {
        setFirstName(_firstName);
        setLastName(_lastName);
        setAge(_age);
        setHeight(_height);

        counter++;
    }

    /**
     * Sets the first name of this person.
     *
     * @param _firstName The new first name.
     */
    public void setFirstName(String _firstName)
    {
        firstName = _firstName;
    }

    /**
     * Sets the last name of this person.
     *
     * @param _lastName The new last name.
     */
    public void setLastName(String _lastName)
    {
        lastName = _lastName;
    }

    /**
     * Sets the age of this person.
     *
     * Must be positive and less than or equal to 100.
     *
     * @param _age The new age to set.
     */
    public void setAge(int _age)
    {
        if(_age > 0 && _age < MAX_AGE)
        {
            age = _age;
        }
    }

    /**
     * Sets the height of this person
     *
     * Must be positive and less than or equal to 200.
     *
     * @param _height The new height to set.
     */
    public void setHeight(double _height)
    {
        if(_height > 0 && _height <= MAX_HEIGHT)
        {
            height = _height;
        }
    }

    /**
     * Get the first name of this person.
     *
     * @return The first name of this person.
     */
    public String getFirstName()
    {
        return firstName;
    }

    /**
     * Get the last name of this person.
     *
     * @return The last name of this person.
     */
    public String getLastName()
    {
        return lastName;
    }

    /**
     * Get the age of this person.
     *
     * @return The age of this person.
     */
    public int getAge()
    {
        return age;
    }

    /**
     * Get the height of this person.
     *
     * @return The height of this person.
     */
    public double getHeight()
    {
        return height;
    }

    /**
     * Grab details of this person
     * @return A string showing the full name and age of this person.
     */
    public String getDetails()
    {
        return "Hello my name is " + firstName + " " + lastName + " and my age is " + age;
    }
    
        
    /**
     * @return The number of times a Person object was instantiated.
     */
    public String getNumberOfTimesCreated()
    {
        String howMany = "too many times!";
        
        switch(counter)
        {
            case 0:
                howMany = "none";
                break;
            case 1:
                howMany = "once";
                break;
            case 2:
                howMany = "twice";
                break;
        }
        
        return howMany;
    }
}

Playground.class

/**
 * A class representing a playground containing people.
 * 
 * Lab 4
 * 
 * @author Chad
 * @version 1.0
 */
public class Playground
{
    //Constants
    public static final int AGE_OF_SENIORITY = 65;
    public static final int NEW_AGE = 73;
    public static final String NEW_FIRST_NAME = "Oliver";
    public static final String NEW_LAST_NAME = "Tree";
    public static final double NEW_HEIGHT = 120.0;
    
    /**
     * Add people to the playground
     */
    public void run()
    {
        Person person1 = new Person();
        
        String defaultDetails = "DEFAULT VALUES" +
            "\nAge: " + person1.getAge() +
            "\nName: " + person1.getFirstName() + " " + person1.getLastName() +
            "\nHeight: " + person1.getHeight() + "cm";
            
        System.out.println(defaultDetails);
        
        person1.setAge(NEW_AGE);
        person1.setFirstName(NEW_FIRST_NAME);
        person1.setLastName(NEW_LAST_NAME);
        person1.setHeight(NEW_HEIGHT);
        
        String isOld = "Person is young!";
        if(person1.getAge() > AGE_OF_SENIORITY)
        {
            isOld = "Person is old!";
        }
        
        String newDetails = "\nNEW VALUES" +
            "\nAge: " + person1.getAge() +
            "\nName: " + person1.getFirstName() + " " + person1.getLastName() +
            "\nHeight: " + person1.getHeight() + "cm" +
            "\nStatus: " + isOld;
            
        System.out.println(newDetails);
    }
}