How can I access an an arraylist from a different class in Java?

import java.util.ArrayList; 
import java.util.Collections;

public class Cards
{
    public static enum cards
 开发者_Go百科   {
        D_A, D_2, D_3, D_4, D_5, D_6, D_7, D_8, D_9, D_10, D_J, D_Q, D_K,
        H_A, H_2, H_3, H_4, H_5, H_6, H_7, H_8, H_9, H_10, H_J, H_Q, H_K,
        C_A, C_2, C_3, C_4, C_5, C_6, C_7, C_8, C_9, C_10, C_J, C_Q, C_K,
        S_A, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9, S_10, S_J, S_Q, S_K,
    }

    public Cards()
    {
        ArrayList<cards> deck; 
        deck = new ArrayList<cards>(51);
        for (cards card : cards.values())
        {
            deck.add(card);
        }
        Collections.shuffle(deck);
        String img = deck.get(2).toString()+".gif";     
        System.out.println(img);
    }

    public static void main(String[] args)
    {
        Cards CardDeck = new Cards();
    }
}

I want to access the arraylist in a different class. How can I do this?

Use Cards.cards.D_A or whichever you want. Don't forget to import the class if they are not in the same package...

Since it's static, Cards.cards ought to work.

To access the ArrayList you need to have the list as a member of the class. Then you need to either establish an accessor method, or make that member variable public (not recommended).

The first solution is provided here:

public class Cards
{
    private ArrayList<cards> deck; 

    public static enum cards
    {
        D_A, D_2, D_3, D_4, D_5, D_6, D_7, D_8, D_9, D_10, D_J, D_Q, D_K,
        H_A, H_2, H_3, H_4, H_5, H_6, H_7, H_8, H_9, H_10, H_J, H_Q, H_K,
        C_A, C_2, C_3, C_4, C_5, C_6, C_7, C_8, C_9, C_10, C_J, C_Q, C_K,
        S_A, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9, S_10, S_J, S_Q, S_K,
    }

    public Cards()
    {
        deck = new ArrayList<cards>(51);
        for (cards card : cards.values())
        {
            deck.add(card);
        }
        Collections.shuffle(deck);
        String img = deck.get(2).toString()+".gif";     
        System.out.println(img);
    }
    public ArrayList <cards> getDeck() {
        return deck;
    }
    public static void main(String[] args)
    {
        Cards CardDeck = new Cards();
    }
}