COMP 1409 | Lab03

Person.class

/**
 * Class to model a Person
 *
 * Lab 3
 * 
 * @author Chad
 * @version 1.2
 */
public class Person
{
    private static int counter = 0;
    
    //Default Values
    private static final String DEFAULT_FIRST_NAME = "John";
    private static final String DEFAULT_LAST_NAME = "Doe";
    private static final int DEFAULT_AGE = 1;
    private static final double DEFAULT_HEIGHT = 150.0;
    
    //Maximum Values
    private static final int MAXIMUM_AGE = 100;
    private static final double MAXIMUM_HEIGHT = 200.0;
    
    //Instance Variables
    private String firstName;
    private String lastName;
    private int age = DEFAULT_AGE;
    private double height = DEFAULT_HEIGHT;
    
    /**
     * Constructor for creating a Person instance with default values.
     */
    public Person()
    {
        counter++;
        
        firstName = DEFAULT_FIRST_NAME;
        lastName = DEFAULT_LAST_NAME;
        age = DEFAULT_AGE;
        height = DEFAULT_HEIGHT;
    }
    
    /**
     * Constructor for creating a Person instance with first and last name.
     * 
     * @param _firstName First name of our Person
     * @param _lastName Last name of our Person
     */
    public Person(String _firstName, String _lastName)
    {
        counter++;
        
        setFirstName(_firstName);
        setLastName(_lastName);
        
        age = DEFAULT_AGE;
        height = DEFAULT_HEIGHT;
    }
    
    /**
     * 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)
    {
        counter++;
        
        setFirstName(_firstName);
        setLastName(_lastName);
        setAge(_age);
        setHeight(_height);
    }

    /**
     * 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 MAXIMUM_AGE.
     *
     * @param _age The new age to set.
     */
    public void setAge(int _age)
    {
        if(_age >= 0 && _age <= MAXIMUM_AGE)
        {
            age = _age;
        }
    }

    /**
     * Sets the height of this Person.
     *
     * Must be positive and less than or equal to MAXIMUM_HEIGHT.
     *
     * @param _height The new height to set
     */
    public void setHeight(double _height)
    {
        if(_height >= 0 && _height <= MAXIMUM_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;
    }
    
    /**
     * See how many times a Person object has been created.
     * 
     * @return A string showing the amount of times a person object was created.
     */
    public String getNumberOfTimesCreated()
    {
        switch(counter)
        {
            case 0:
                return "none";
            case 1:
                return "once";
            case 2:
                return "twice";
            default:
                return "too many times!";
        }
    }
}