/*
  Author:  James Tam
  Version: Feb. 1, 2021

  JT: Program has been over documented (for beginners) because it covers some
  complex concepts.
*/
public class Driver
{
    public static void main(String [] args)
    {
        //JT: This is only an example, I am not a hoarder of cats 
        //(or other pets for that matter).
        final int CAT_CAPACITY = 100;

        //Array index
        int currentCat;

        //References to cat objects.
        //Step 1 in creating an object (declaring a reference)
        Cat tigger;
        Cat temp;
       
        //Reference to an array.
        //Step 1 in creating an array of references (declaring a reference
        //to the array).
        Cat [] myBuddies;


        //Invalid at this point.
        //System.out.println(tigger.whatMood());

        //New cat object 
        //Step 2 in creating an object (calling the constructor)
        tigger = new Cat();
        System.out.println("Single cat's mood: " + tigger.whatMood());

        //New array, each element is empty/null.
        //Step 2 in creating an array of references (creating the array with
        //a specified size).
        myBuddies = new Cat[CAT_CAPACITY];

        //As long as there's a cat show it's mood.
        System.out.println("Moods of my buddies...");
        currentCat = 0;
        temp = myBuddies[currentCat];
        while ((currentCat < myBuddies.length) && (temp != null))
        {
            System.out.println("\t" + temp.whatMood());
            currentCat++;
            temp = myBuddies[currentCat];
        }

        //Step 3 in creating an array of references (creating the elements by 
        //calling the constructor).
        myBuddies[0] = new Cat(Cat.SLEEPY);
        myBuddies[1] = new Cat(Cat.PLAYFUL);
        //As long as there's a cat show it's mood.
        System.out.println("Moods of my buddies...now that I have some friends");
        currentCat = 0;
        temp = myBuddies[currentCat];
        while ((currentCat < myBuddies.length) && (temp != null))
        {
            System.out.println("\t" + temp.whatMood());
            currentCat++;
            temp = myBuddies[currentCat];
        }

    }
}