Paint not showing up on JPanel? I want to paint only if if statement conditions are met

Question

I want to paint the walls of the pacman maze for my APCS A final. I am relatively new to graphics, as you can probably tell. The paintComponent() methods don't appear to be doing anything and when I run the program I just get a black panel. So how do I get the rectangles and circles to actually show up? I want to do as little in the driver as possible and do it all in the drawMaze() method, which is called in the constructor.

Driver:

import java.awt.event.*;
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

public class Game {

    public static void main(String[] args) {
    
        Maze board = new Maze();
    
        EventQueue.invokeLater(new Runnable() {
            public void run()
            {
                board.createAndShowGUI();
            }
        });

    }

}

Maze Class:

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

public class Maze extends JPanel 
{
    //boardsize in pixels
    public static int BOARDWIDTH = 2700;
    public static int BOARDHEIGHT = 3100;

    //Level data copied from the first pacman maze
    //These numbers make up the maze. 0 is an empty space, 1 is a left wall, 2 is a top wall, 4 is a right wall, 8 is a bottom wall, 16 is a pellet, and 32 is a mega pellet
    //These numbers are additive to make a space on the board. IE 19 would be a top left corner with a pellet (1 + 2 + 16)

    private final int [][] LEVELDATA = {{3, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6},
    {5, 19, 26, 26, 26, 26, 18, 26, 26, 26, 26, 26, 22, 5, 19, 26, 26, 26, 26, 26, 18, 26, 26, 26, 26, 22, 5},
    {5, 21, 3, 2, 2, 6, 21, 3, 2, 2, 2, 6, 21, 5, 21, 3, 2, 2, 2, 6, 21, 3, 2, 2, 6, 21, 5},
    {5, 37, 1, 0, 0, 4, 21, 1, 0, 0, 0, 4, 21, 5, 21, 1, 0, 0, 0, 4, 21, 1, 0, 0, 4, 37, 5},
    {5, 21, 9, 8, 8, 12, 21, 9, 8, 8, 8, 12, 21, 13, 21, 9, 8, 8, 8, 12, 21, 9, 8, 8, 12, 21, 5},
    {5, 17, 26, 26, 26, 26, 16, 26, 26, 18, 26, 26, 24, 26, 26, 24, 26, 24, 26, 26, 16, 26, 26, 26, 26, 20, 5},
    {5, 21, 3, 2, 2, 6, 21, 3, 6, 21, 3, 2, 2, 2, 2, 2, 6, 21, 3, 6, 21, 3, 2, 2, 6, 21, 5},
    {5, 21, 9, 8, 8, 12, 21, 1, 4, 21, 9, 8, 8, 0, 8, 8, 12, 21, 1, 4, 21, 9, 8, 8, 12, 21, 5},
    {5, 25, 26, 26, 26, 26, 20, 1, 4, 25, 26, 26, 22, 5, 19, 26, 26, 28, 1, 4, 17, 26, 26, 26, 26, 28},
    {9, 10, 10, 10, 10, 6, 21, 1, 0, 2, 2, 6, 5, 5, 5, 3, 2, 2, 0, 4, 21, 3, 10, 10, 10, 10, 12},
    {2, 2, 2, 2, 6, 5, 21, 1, 0, 8, 8, 12, 5, 5, 5, 9, 8, 8, 0, 4, 21, 5, 3, 2, 2, 2, 2},
    {0, 0, 0, 0, 4, 5, 21, 1, 4, 3, 10, 10, 8, 10, 8, 10, 10, 6, 1, 4, 21, 5, 1, 0, 0, 0, 0},
    {8, 8, 8, 8, 12, 5, 21, 1, 4, 5, 3, 10, 10, 10, 10, 10, 6, 5, 1, 4, 21, 5, 9, 8, 8, 8, 8},
    {11, 10, 10, 10, 10, 12, 21, 9, 12, 5, 5, 3, 2, 2, 2, 6, 5, 5, 9, 12, 21, 9, 10, 10, 10, 10, 15}, 
    {10, 10, 10, 10, 10, 10, 16, 10, 10, 4, 5, 1, 0, 0, 0, 4, 5, 1, 10, 10, 16, 10, 10, 10, 10, 10, 10},
    {11, 10, 10, 10, 10, 6, 21, 3, 6, 5, 5, 9, 8, 8, 8, 12, 5, 3, 6, 21, 3, 10, 10, 10, 10, 15},
    {2, 2, 2, 2, 6, 5, 21, 1, 4, 5, 9, 8, 8, 8, 8, 8, 12, 5, 1, 4, 21, 5, 3, 2, 2, 2, 2},
    {0, 0, 0, 0, 4, 5, 21, 1, 4, 1, 10, 10, 10, 10, 10, 10, 10, 4, 1, 4, 21, 5, 1, 0, 0, 0, 0},
    {8,  8,  8,  8, 12, 5, 21, 1, 4, 5, 3, 2, 2, 2, 2, 2, 6, 5, 1, 4, 21, 5, 9, 8, 8, 8, 8},
    {3, 10, 10, 10, 10, 12, 21, 9, 12, 5, 9, 8, 8, 0, 8, 8, 12, 5, 1, 4, 25, 9, 10, 10, 10, 10, 6},
    {5, 19, 26, 26, 26, 26, 16, 26, 26, 24, 26, 26, 22, 5, 19, 26, 26, 24, 1, 4, 16, 26, 26, 26, 26, 22, 5},
    {5, 21, 3, 2, 2, 6, 21, 3, 2, 2, 2, 6, 21, 5, 21, 3, 2, 2, 2, 6, 21, 3, 2, 2, 6, 21, 5},
    {5, 21, 9, 8, 0, 4, 21, 9, 8, 8, 8, 12, 21, 13, 21, 9, 8, 8, 8, 12, 21, 1, 0, 8, 12, 21, 5},
    {5, 41, 26, 22, 1, 4, 17, 26, 26, 18, 26, 26, 24, 26, 24, 26, 26, 18, 26, 26, 20, 1, 4, 19, 26, 44, 5},
    {1, 2, 6, 21, 1, 4, 21, 3, 6, 21, 3, 2, 2, 2, 2, 2, 6, 21, 3, 6, 21, 1, 4, 21, 3, 2, 4},
    {1, 8, 12, 21, 9, 12, 21, 1, 4, 21, 9, 8, 8, 0, 8, 8, 12, 21, 1, 4, 21, 9, 12, 21, 9, 8, 4},
    {5, 19, 26, 24, 26, 26, 28, 1, 4, 25, 26, 26, 22, 5, 19, 26, 26, 28, 1, 4, 25, 26, 26, 24, 21, 22, 5},
    {5, 21, 3, 2, 2, 2, 2, 0, 0, 2, 2, 6, 21, 5, 21, 3, 2, 2, 0, 0, 2, 2, 2, 26, 21, 5},
    {5, 21,  9,  8,  8,  8,  8,  8,  8,  8,  8, 12, 21, 13, 21,  9,  8,  8,  8,  8,  8,  8,  8, 12, 21, 5},
    {5, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 24, 26, 24, 26, 26, 26, 26, 26, 26, 26, 26, 26, 28, 5},
    {9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,  10, 10, 12}};

    public Maze() {

}

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    
    //creates a temporary array because LEVELDATA can't be modified
    int[][] temp = LEVELDATA;
    
    //Draws the maze based on the level data
    for (int r = 0; r < 31; r++) {
        for (int c = 0; c < 26; c++) {
            final int row = r;
            final int col = c;
            
            //draws a power pellet
            if(temp[r][c] - 32 >=0){
                g.setColor (Color.white);
                g.fillOval((row*10)-7, (col*10)-7, 5, 5);
                temp[r][c] -= 32;
                }
            
            //draws a tic tac
            if(temp[r][c] - 16 >=0) {
                g.setColor (Color.white);
                g.fillOval((row*10)-7, (col*10)-7, 1, 1);
                temp[r][c] -= 16;
            }
            
            //draws a bottom wall
            if(temp[r][c] - 8 >=0) {
                g.setColor (Color.blue);
                g.fillRect((row*10) - 10, (col*10) - 1, 10, 1);
                temp[r][c] -= 8;
            }
            
            //draws a right wall
            if(temp[r][c] - 4 >=0) {
                g.setColor (Color.blue);
                g.fillRect((row*10) - 1, (col*10) - 10, 1, 10);
                temp[r][c] -= 4;
            }
            
            //draws a top wall
            if(temp[r][c] - 2 >=0) {
                g.setColor (Color.blue);
                g.fillRect((row*100) - 100, (col*10) - 10, 10, 1);
                temp[r][c] -= 2;
            }
            
            //draws a left wall
            if(temp[r][c] - 1 >=0) {
                g.setColor (Color.blue);
                g.fillRect((row*10) - 10, (col*10) - 1, 1, 10);
                temp[r][c] -= 1;
            }
        }
    }
}

/**
 * Creates the Gui for the maze
 */
public void createAndShowGUI() {
    
    JComponent board = new Maze();
    
    JPanel panel = new JPanel();
    panel.setBackground(Color.black);
    panel.add(board);
    
    JFrame pacFrame = new JFrame();
    pacFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    pacFrame.setContentPane(panel);
    setSize(BOARDWIDTH, BOARDHEIGHT);
    pacFrame.pack();
    pacFrame.setVisible(true);
}

}