JPanel template #1

package org.example;

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

public class Panel extends JPanel {
    private static final Dimension WINDOW_SIZE = new Dimension(800, 600);
    private static final Color WINDOW_BACKGROUND_COLOR = new Color(0, 0, 64);
    private static final String WINDOW_NAME = "WINDOW_NAME";
    private static final int TIMER_DELAY = 10;

    public static void main(String[] args) {
        new Panel();
    }

    public Panel() {
        setupFrameAndPanel();
        new Timer(TIMER_DELAY, new TimerListener()).start();
    }


    private class TimerListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            //
        }
    }

    private class KeyListener extends KeyAdapter {
        @Override
        public void keyPressed(KeyEvent e) {
            int keyCode = e.getKeyCode();

            //
        }

        @Override
        public void keyReleased(KeyEvent e) {
            int keyCode = e.getKeyCode();

            //
        }
    }

    private class MouseListener extends MouseAdapter {
        //
    }

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

        //
    }

    private void setupFrameAndPanel() {
        var frame = new JFrame(WINDOW_NAME);
        frame.setSize(WINDOW_SIZE);
        setFocusTraversalKeysEnabled(true);
        setFocusable(true);
        addKeyListener(new KeyListener());
        addMouseListener(new MouseListener());
        frame.add(this);
        setBackground(WINDOW_BACKGROUND_COLOR);
        frame.setResizable(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}