java – Can I get the debugging conclusion

import java.awt.CardLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

import com.feedingfrenzy.controller.GameManager;

public class MainMenuPanel extends MenuPanel {

    // BUTTONS
    non-public JButton startNewGameButton;
    non-public JButton highScoresButton;
    non-public JButton helpButton;
    non-public JButton settingsButton;
    non-public JButton aboutButton;
    non-public JButton creditsButton;
    non-public JButton exitButton;
    non-public GameManager gameManager;
    non-public GamePanel gamePanel;

    public MainMenuPanel(CardLayout cardLayout, JPanel cardPanel, GameManager gameManager, GamePanel gamePanel) {
        tremendous(cardLayout, cardPanel);
        this.gameManager = gameManager;
        this.gamePanel = gamePanel;
        attempt {
            backGroundImage = ImageIO.learn(getClass().getResource("/backgrounds/main_menu_background.jpg"));
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Set GridBagLayout and constrains
        GridBagLayout gridBagLayout = new GridBagLayout();
        gridBagLayout.columnWidths = new int[] { 0, 150, 50 };
        gridBagLayout.rowHeights = new int[] { 0, 65, 65, 65, 65, 65, 65, 65, 0, 0 };
        gridBagLayout.columnWeights = new double[] { 1.0, 0.0 };
        gridBagLayout.rowWeights = new double[] { 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, Double.MIN_VALUE };
        setLayout(gridBagLayout);

        startNewGameButton = new JButton("New Recreation");
        GridBagConstraints gbc_newGameButton = new GridBagConstraints();
        gbc_newGameButton.fill = GridBagConstraints.BOTH;
        gbc_newGameButton.insets = new Insets(0, 0, 15, 0);
        gbc_newGameButton.gridx = 1;
        gbc_newGameButton.gridy = 1;
        add(startNewGameButton, gbc_newGameButton);

        highScoresButton = new JButton("Excessive Scores");
        GridBagConstraints gbc_highScoresButton = new GridBagConstraints();
        gbc_highScoresButton.fill = GridBagConstraints.BOTH;
        gbc_highScoresButton.insets = new Insets(0, 0, 15, 0);
        gbc_highScoresButton.gridx = 1;
        gbc_highScoresButton.gridy = 2;
        add(highScoresButton, gbc_highScoresButton);

        helpButton = new JButton("Assist");
        GridBagConstraints gbc_helpButton = new GridBagConstraints();
        gbc_helpButton.fill = GridBagConstraints.BOTH;
        gbc_helpButton.insets = new Insets(0, 0, 15, 0);
        gbc_helpButton.gridx = 1;
        gbc_helpButton.gridy = 3;
        add(helpButton, gbc_helpButton);

        settingsButton = new JButton("Settings");
        GridBagConstraints gbc_settingsButton = new GridBagConstraints();
        gbc_settingsButton.fill = GridBagConstraints.BOTH;
        gbc_settingsButton.insets = new Insets(0, 0, 15, 0);
        gbc_settingsButton.gridx = 1;
        gbc_settingsButton.gridy = 4;
        add(settingsButton, gbc_settingsButton);

        aboutButton = new JButton("About");
        GridBagConstraints gbc_aboutButton = new GridBagConstraints();
        gbc_aboutButton.fill = GridBagConstraints.BOTH;
        gbc_aboutButton.insets = new Insets(0, 0, 15, 0);
        gbc_aboutButton.gridx = 1;
        gbc_aboutButton.gridy = 5;
        add(aboutButton, gbc_aboutButton);

        creditsButton = new JButton("Credit");
        GridBagConstraints gbc_creditsButton = new GridBagConstraints();
        gbc_creditsButton.fill = GridBagConstraints.BOTH;
        gbc_creditsButton.insets = new Insets(0, 0, 15, 0);
        gbc_creditsButton.gridx = 1;
        gbc_creditsButton.gridy = 6;
        add(creditsButton, gbc_creditsButton);

        exitButton = new JButton("Exit");
        GridBagConstraints gbc_exitButton = new GridBagConstraints();
        gbc_exitButton.fill = GridBagConstraints.BOTH;
        gbc_exitButton.insets = new Insets(0, 0, 15, 0);
        gbc_exitButton.gridx = 1;
        gbc_exitButton.gridy = 7;
        add(exitButton, gbc_exitButton);

        setActionListeners();
    }

    non-public void setActionListeners() {
        startNewGameButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, GamePanel.class.getName());
            gameManager.startGame(true);
        });
        highScoresButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, HighScorePanel.class.getName());
        });
        helpButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, HelpPanel.class.getName());
        });
        settingsButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, ChangeSettingsPanel.class.getName());
        });
        aboutButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, AboutPanel.class.getName());
        });
        creditsButton.addActionListener(ae -> {
            cardLayout.present(parentPanel, CreditsPanel.class.getName());
        });
        exitButton.addActionListener(ae -> {
            int consequence = JOptionPane.showConfirmDialog(MainMenuPanel.this, "Are you positive you wish to exit?",
                    "Exit Recreation?", JOptionPane.YES_NO_OPTION);
            if (consequence == JOptionPane.YES_OPTION) {
                System.exit(0);
            }
        });
    }

}```