Starting with the TicTacToe game. Trying to find the best way to structure my project.

.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="true" project-jdk-name="14" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="true" project-jdk-name="14 (2)" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

DemoProjects/src/sprites/shootingMissles/Board.java

@@ -1,16 +1,12 @@
 package sprites.shootingMissles;
 
-import java.awt.Color;
-import java.awt.Graphics;
-import java.awt.Graphics2D;
-import java.awt.Toolkit;
+import javax.swing.*;
+import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 import java.util.List;
-import javax.swing.JPanel;
-import javax.swing.Timer;
 
 public class Board extends JPanel implements ActionListener {
 
@@ -76,21 +72,16 @@ public class Board extends JPanel implements ActionListener {
         List<Missile> missiles = spaceShip.getMissiles();
 
         for (int i = 0; i < missiles.size(); i++) {
-
             Missile missile = missiles.get(i);
-
             if (missile.isVisible()) {
-
                 missile.move();
             } else {
-
                 missiles.remove(i);
             }
         }
     }
 
     private void updateSpaceShip() {
-
         spaceShip.move();
     }
 

DemoProjects/src/sprites/shootingMissles/Missile.java

@@ -2,7 +2,6 @@ package sprites.shootingMissles;
 
 public class Missile extends Sprite {
 
-    private final int BOARD_WIDTH = 390;
     private final int MISSILE_SPEED = 2;
 
     public Missile(int x, int y) {

TicTacToe - MinMax/src/Board.java

@@ -0,0 +1,2 @@
+public class Board {
+}

TicTacToe - MinMax/src/Executor.java

@@ -0,0 +1,2 @@
+public class Executor {
+}