Board.java

import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import javax.imageio.ImageIO;
import javax.swing.*;

public class Board extends JPanel{
    public static Board board = null;
    private Image casinoTable_img;
    private ArrayList<Card> player1_cards;
    private ArrayList<Card> player2_cards;
    private ArrayList<Card> player1_cards_backside;
    private ArrayList<Card> player2_cards_backside;
    private boolean revealPlayer1Numbers = false;
    private boolean revealPlayer2Numbers = false;

    public static Board getBoard(){
        if(board == null){
            board = new Board();
        }
        return board;
    }

    private Board(){
        super();
        setBounds(0,0,400,800);
        NumberManager nm = NumberManager.getNumberManager();
        //get numbers for P1&2 that are randomly generated by NumberManager Class
        ArrayList<String> player1_nums = nm.getPlayer1_numbers();
        ArrayList<String> player2_nums = nm.getPlayer2_numbers();

        //create cards(frontside) for player1&2
        //Based on the information that received above from NumberManager Class
        player1_cards = new ArrayList<Card>();
        player2_cards = new ArrayList<Card>();
        for(int i = 0; i < player1_nums.size(); i++){
            int num = Integer.parseInt(player1_nums.get(i));
            int num2 = Integer.parseInt(player2_nums.get(i));
            player1_cards.add(new Card(num));
            player2_cards.add(new Card(num2));
        }

        //backside
        player1_cards_backside = new ArrayList<Card>();
        player2_cards_backside = new ArrayList<Card>();
        for(int i = 0; i < 3; i++){
            player1_cards_backside.add(new Card(-1));
            player2_cards_backside.add(new Card(-2));
        }

        try{
            casinoTable_img = ImageIO.read(new File(Card.SharedImgPath + "Casino_Table01.jpg"));
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }

    @Override
    public void paintComponent(Graphics g){
        super.paintComponent(g);

        //draw table
        g.drawImage(casinoTable_img, 0, 0, 400, 800, null);
        int coordinateX, coordinateY;
        int sizeX, sizeY;
        int marginForPlayer1Cards = 10, marginForPlayer2Cards = 25;

        //draw player2 cards
        coordinateX = 100;
        coordinateY = 100;
        sizeX = 50;
        sizeY = 75;
        if(!revealPlayer2Numbers){
            displayCards(player2_cards_backside, coordinateX, coordinateY, sizeX, sizeY, marginForPlayer2Cards, g);
        }
        else{
            displayCards(player2_cards, coordinateX, coordinateY, sizeX, sizeY, marginForPlayer2Cards, g);
        }

        //draw player1 cards
        coordinateX = 40;
        coordinateY = 500;
        sizeX = 100;
        sizeY = 175;
        if(!revealPlayer1Numbers){
            displayCards(player1_cards_backside, coordinateX, coordinateY, sizeX, sizeY, marginForPlayer1Cards, g);
        }
        else{
            displayCards(player1_cards, coordinateX, coordinateY, sizeX, sizeY, marginForPlayer1Cards, g);
        }

        g.dispose();
    }

    public void displayCards(ArrayList<Card> cards, int coordinateX, int coordinateY, int sizeX, int sizeY, int margin, Graphics g){
        Image cardImg;
        for(int i = 0; i < cards.size(); i++){
            cardImg = cards.get(i).getImage();
            g.drawImage(cardImg, coordinateX, coordinateY, sizeX, sizeY, null);
            coordinateX += sizeX + margin;
        }
    }

    public void revealPlayer2Numbers(){
        revealPlayer2Numbers = true;
        repaint();
    }

    public void FlipPlayer1Numbers(){
        revealPlayer1Numbers = !revealPlayer1Numbers;
        repaint();
    }
}