Please help me with the TODO statements in the program

package pkgCore;

import java.util.ArrayList;

public class Deck {

// TODO: Add 'cards' attribute that is an ArrayList of Card

private ArrayList cards = new ArrayList();

public Deck(ArrayList cards) {

super();

this.cards = cards;

}

// TODO: Add a contructor that passes in the number of decks, and then populates

// ArrayList with cards (depending on number of decks).

// Example: Deck(1) will build one 52-card deck. There are 52 different cards

// 2 clubs, 3 clubs... Ace clubs, 2 hearts, 3 hearts... Ace hearts, etc

// Deck(2) will create an array of 104 cards.

// TODO: Add a draw() method that will take a card from the deck and

// return it to the caller

}