Re: Working with Nested Classes

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.ArrayList;
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;

public class GameBoard extends JFrame
{
    JPanel pane;
    JPanel boardAndStarterCard;
    JPanel board;
    JPanel starterCard;
    JPanel inPlay; // remove this once it works, so the thing can look
better
    JPanel inPlayR1;
    JPanel inPlayR2;
    JLabel tableScore;
    JPanel playerHand;
    JLabel out;
    JTextField in;

    public GameBoard(int players) {
        super("Gemstones Cribbage");
        setSize(800, 800);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        GridLayout grid = new GridLayout(1,1);
        pane = new JPanel();
        pane.setLayout(grid);

        // inPlay
        inPlay = new CardRow(13);
        pane.add(inPlay);

        // Content Pane
        setContentPane(pane);
        setVisible(true);
    }

    public void updateInPlay(ArrayList <Comparable> cards)
    {
        inPlay.changeCards(cards);
    }

    // CardRow
Class ///////////////////////////////////////////////////////////
    public class CardRow extends JPanel
    {
        ArrayList <Comparable> cards;
        int slots;

        public CardRow(int mySlots)
        {
            setLayout(new GridLayout(1, mySlots));
            cards = new ArrayList <Comparable>();
            slots = mySlots;
            drawCards();
        }

        public void drawCards()
        {

        }

        public void changeCards(ArrayList <Comparable> list)
        {
            cards = list;
            drawCards();
        }

    }
}

That's a SSCCE version of my class. Using http://www.innovation.ch/java/java_compile.html
since I'm away from my desktop, the error was:
/tmp/5587/GameBoard.java:43: cannot find symbol
symbol : method changeCards(java.util.ArrayList)
location: class javax.swing.JPanel
        inPlay.changeCards(cards);
                      ^
1 error

The only major change I made was to convert the ArrayList of <Card>
objects into an ArrayList of <Comparable> objects. Everything else
was simply triming. Thanks for the help.