apply the final debugging

Java-Knight/src/main/java/org/project/Interface/IAttachable.java

@@ -3,6 +3,6 @@ package org.project.Interface;
 import org.project.entity.Entity;
 
 public interface IAttachable {
-    public void AttachTo(Entity entity);
-    public void DeattachFrom(Entity entity);
+    public void AttachTo(Entity entity, boolean fromInventory);
+    public void DeattachFrom(Entity entity, boolean toInventory);
 }

Java-Knight/src/main/java/org/project/Main.java

@@ -1,15 +1,49 @@
 package org.project;
 
-import org.project.location.Location;
+import org.project.constants.appConstants.GameModes;
+import org.project.constants.appConstants.TextColor;
+import org.project.engine.MainEngine;
 
-import java.util.ArrayList;
-import java.util.List;
+import java.util.Scanner;
 
 public class Main {
-    public static void main(String[] args) {
-        // TODO: ADD LOCATIONS TO YOUR GAME
-        List<Location> locations = new ArrayList<>();
+    static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        boolean endGame = false;
 
-        // TODO: IMPLEMENT GAMEPLAY
+        while (true) {
+
+            System.out.println(TextColor.Cyan + "JAVA KNIGHT" + TextColor.Reset);
+            System.out.println(
+                    """
+                    0 > Single Player
+                    1 > Local Multiplayer
+                    2 > Exit
+                    """
+            );
+
+            GameModes gameMode = null;
+            while (true){
+                int choice = scanner.nextInt();
+
+                if (choice == 0) {
+                    gameMode = GameModes.SINGLE_PLAYER;
+                    break;
+                } else if (choice == 1) {
+                    gameMode = GameModes.MULTI_PLAYER_LOCAL;
+                    break;
+                } else if (choice == 2) {
+                    endGame = true;
+                    break;
+                }
+            }
+
+            if (endGame) {
+                break;
+            }
+
+            MainEngine engine = MainEngine.CreateEngine(gameMode);
+            engine.run();
+        }
     }
 }

Java-Knight/src/main/java/org/project/engine/BattleEngine.java

@@ -7,6 +7,10 @@ public abstract class BattleEngine {
     public Entity Player2;
 
     public BattleEngine(Entity player1, Entity player2) {
+        player1.ResetStamina();
+        player1.RestoreHealth();
+        player2.RestoreHealth();
+        player2.ResetStamina();
         Player1 = player1;
         Player2 = player2;
     }

Java-Knight/src/main/java/org/project/engine/MainEngine.java

@@ -43,6 +43,7 @@ public abstract class MainEngine {
         while (true) {
             for (PlayerRoles role : roles) {
                 System.out.println(index + " > " + role.name().toLowerCase());
+                index++;
             }
             int choice = scanner.nextInt();
 

Java-Knight/src/main/java/org/project/engine/MultiPlayerBattleEngine.java

@@ -13,8 +13,8 @@ import java.util.Hashtable;
 import java.util.Scanner;
 
 public class MultiPlayerBattleEngine extends BattleEngine {
-    private Player player1;
-    private Player player2;
+    private final Player player1;
+    private final Player player2;
     private Player player1Past;
     private Player player2Past;
 
@@ -22,54 +22,67 @@ public class MultiPlayerBattleEngine extends BattleEngine {
         super(player1, player2);
         this.player1 = (Player) Player1;
         this.player2 = (Player) Player2;
-        player1Past = null;
-        player2Past = null;
+        player1Past = player1.copy();
+        player2Past = player2.copy();
     }
 
     @Override
     public void StartBattle() {
+        EntityDiff playerDiff;
+        EntityDiff enemyDiff;
 
         while (true) {
-            FightMoves player1Move = PlayerMovesMenu(player1, player2);
-            showMoveExplanation(player1Move, player1, player2);
+            if (player1.GetState() != EntityState.FROZEN) {
+                FightMoves player1Move = PlayerMovesMenu(player1, player2);
+                showMoveExplanation(player1Move, player1, player2Past);
+
+                playerDiff = getPlayerDiff(player1Past, player1);
+                enemyDiff = getPlayerDiff(player2Past, player2);
+
+                System.out.println();
+                showFighter(playerDiff, player1);
+                showFighter(enemyDiff, player2);
+                System.out.println();
+            }
+
+            if (player1.GetState() == EntityState.DEAD) {
+                System.out.println(TextColor.Green + player2.Name + " WON!" + TextColor.Reset);
+                return;
+            }
 
             if (player1Past.GetState() == EntityState.FROZEN) {
                 player1.SetState(EntityState.ALIVE);
             }
 
-            player1Past = player1;
-            player2Past = player2;
+            player1Past = player1.copy();
+            player2Past = player2.copy();
 
-            EntityDiff playerDiff = getPlayerDiff(player1Past, player1);
-            EntityDiff enemyDiff = getPlayerDiff(player2Past, player2);
 
-            showFighter(playerDiff, player1);
-            showFighter(enemyDiff, player2);
+            if (player2.GetState() != EntityState.FROZEN)
+            {
+                FightMoves player2Move = PlayerMovesMenu(player2, player1);
+                showMoveExplanation(player2Move, player2, player1Past);
 
-            FightMoves player2Move = PlayerMovesMenu(player2, player1);
-            showMoveExplanation(player2Move, player2, player1);
+                playerDiff = getPlayerDiff(player1Past, player1);
+                enemyDiff = getPlayerDiff(player2Past, player2);
 
-            if (player2Past.GetState() == EntityState.FROZEN) {
-                player2.SetState(EntityState.ALIVE);
+                System.out.println();
+                showFighter(playerDiff, player1);
+                showFighter(enemyDiff, player2);
+                System.out.println();
             }
 
-            player1Past = player1;
-            player2Past = player2;
-
-            playerDiff = getPlayerDiff(player1Past, player1);
-            enemyDiff = getPlayerDiff(player2Past, player2);
-
-            showFighter(playerDiff, player1);
-            showFighter(enemyDiff, player2);
-
             if (player2.GetState() == EntityState.DEAD) {
                 System.out.println(TextColor.Green + player1.Name + " WON!" + TextColor.Reset);
                 return;
             }
-            else if (player1.GetState() == EntityState.DEAD) {
-                System.out.println(TextColor.Green + player2.Name + " WON!" + TextColor.Reset);
-                return;
+
+            if (player2Past.GetState() == EntityState.FROZEN) {
+                player2.SetState(EntityState.ALIVE);
             }
+
+            player1Past = player1.copy();
+            player2Past = player2.copy();
         }
     }
 
@@ -88,10 +101,12 @@ public class MultiPlayerBattleEngine extends BattleEngine {
         System.out.println(entity.Name + ":");
 
         String color = diff.health() > 0 ? TextColor.Green : TextColor.Red;
-        System.out.println("    Health: " + entity.Health + " " + color + diff.health() + TextColor.Reset);
+        String sign = diff.health() > 0 ? "+" : "-";
+        System.out.println("    Health: " + entity.Health + " " + color + sign + Math.abs(diff.health()) + TextColor.Reset);
 
         color = diff.stamina() > 0 ? TextColor.Green : TextColor.Red;
-        System.out.println("    Stamina: " + entity.GetStamina() + " " + color + diff.stamina() + TextColor.Reset);
+        sign = diff.stamina() > 0 ? "+" : "-";
+        System.out.println("    Stamina: " + entity.GetStamina() + " " + color + sign + Math.abs(diff.stamina()) + TextColor.Reset);
 
         if (diff.lostShield()) {
             System.out.println("    Shield: " + entity.Shield.getName() + " " + TextColor.Red + "LOST" + TextColor.Reset);
@@ -103,12 +118,14 @@ public class MultiPlayerBattleEngine extends BattleEngine {
 
         if (entity.Shield != null) {
             color = diff.shieldHealth() > 0 ? TextColor.Green : TextColor.Red;
-            System.out.println("    Shield: " + entity.Shield.getName() + " " + color + diff.shieldHealth() + TextColor.Reset);
+            sign = diff.shieldHealth() > 0 ? "+" : "-";
+            System.out.println("    Shield: " + entity.Shield.getName() + " " + color + sign + Math.abs(diff.shieldHealth()) + TextColor.Reset);
         }
 
         if (entity.Costume != null) {
             color = diff.costumeHealth() > 0 ? TextColor.Green : TextColor.Red;
-            System.out.println("    Costume: " + entity.Costume.getName() + " " + color + diff.shieldHealth() + TextColor.Reset);
+            sign = diff.costumeHealth() > 0 ? "+" : "-";
+            System.out.println("    Costume: " + entity.Costume.getName() + " " + color + sign + Math.abs(diff.shieldHealth()) + TextColor.Reset);
         }
     }
 
@@ -156,6 +173,7 @@ public class MultiPlayerBattleEngine extends BattleEngine {
     }
 
     private void showMoveExplanation(FightMoves move, Entity performer, Entity receiver) {
+        System.out.print(TextColor.Cyan);
         switch (move) {
             case FightMoves.LIGHT_ATTACK -> System.out.println(performer.Name + " performs a light attack");
             case FightMoves.HEAVY_ATTACK -> System.out.println(performer.Name + " performs a heavy attack");
@@ -163,5 +181,6 @@ public class MultiPlayerBattleEngine extends BattleEngine {
             case FightMoves.HEAL -> System.out.println(performer.Name + " heals");
             case FightMoves.DEFEND -> System.out.println(performer.Name + " get their guard up!");
         }
+        System.out.print(TextColor.Reset);
     }
 }

Java-Knight/src/main/java/org/project/engine/SinglePlayerBattleEngine.java

@@ -14,63 +14,74 @@ import java.util.Hashtable;
 import java.util.Scanner;
 
 public class SinglePlayerBattleEngine extends BattleEngine {
-    private Player player;
-    private Enemy enemy;
+    private final Player player;
+    private final Enemy enemy;
     private Player playerPast;
     private Enemy enemyPast;
     public SinglePlayerBattleEngine(Player player, Enemy enemy) {
         super(player, enemy);
         this.player = (Player) Player1;
         this.enemy = (Enemy) Player2;
-        playerPast = null;
-        enemyPast = null;
+        playerPast = player.copy();
+        enemyPast = enemy.copy();
     }
 
     @Override
     public void StartBattle() {
+        EntityDiff playerDiff;
+        EntityDiff enemyDiff;
 
         while (true) {
-            FightMoves playerMove = PlayerMovesMenu();
-            showMoveExplanation(playerMove, player, enemy);
+            if (player.GetState() != EntityState.FROZEN) {
+                FightMoves playerMove = PlayerMovesMenu();
+                showMoveExplanation(playerMove, player, enemyPast);
+
+                playerDiff = getPlayerDiff(playerPast, player);
+                enemyDiff = getPlayerDiff(enemyPast, enemy);
+
+                System.out.println();
+                showFighter(playerDiff, player);
+                showFighter(enemyDiff, enemy);
+                System.out.println();
+            }
 
             if (playerPast.GetState() == EntityState.FROZEN) {
                 player.SetState(EntityState.ALIVE);
             }
 
-            playerPast = player;
-            enemyPast = enemy;
-
-            EntityDiff playerDiff = getPlayerDiff(playerPast, player);
-            EntityDiff enemyDiff = getPlayerDiff(enemyPast, enemy);
-
-            showFighter(playerDiff, player);
-            showFighter(enemyDiff, enemy);
-
-            FightMoves botMove = enemy.PlayRound(player);
-            showMoveExplanation(botMove, enemy, player);
-
-            if (enemyPast.GetState() == EntityState.FROZEN) {
-                enemy.SetState(EntityState.ALIVE);
-            }
-
-            playerPast = player;
-            enemyPast = enemy;
-
-            playerDiff = getPlayerDiff(playerPast, player);
-            enemyDiff = getPlayerDiff(enemyPast, enemy);
-
-            showFighter(playerDiff, player);
-            showFighter(enemyDiff, enemy);
-
             if (enemy.GetState() == EntityState.DEAD) {
                 enemy.DropLoot(player);
                 player.AddLevelProgress(enemy.LevelProgressAmount);
                 System.out.println(TextColor.Green + player.Name + " WON!" + TextColor.Reset);
                 return;
             }
-            else if (player.GetState() == EntityState.DEAD) {
+
+            playerPast = player.copy();
+            enemyPast = enemy.copy();
+
+            if (enemy.GetState() != EntityState.FROZEN) {
+                FightMoves botMove = enemy.PlayRound(player);
+                showMoveExplanation(botMove, enemy, playerPast);
+
+                playerDiff = getPlayerDiff(playerPast, player);
+                enemyDiff = getPlayerDiff(enemyPast, enemy);
+
+                System.out.println();
+                showFighter(playerDiff, player);
+                showFighter(enemyDiff, enemy);
+                System.out.println();
+            }
+
+            if (player.GetState() == EntityState.DEAD) {
                 return;
             }
+
+            if (enemyPast.GetState() == EntityState.FROZEN) {
+                enemy.SetState(EntityState.ALIVE);
+            }
+
+            playerPast = player.copy();
+            enemyPast = enemy.copy();
         }
     }
 
@@ -89,10 +100,12 @@ public class SinglePlayerBattleEngine extends BattleEngine {
         System.out.println(entity.Name + ":");
 
         String color = diff.health() > 0 ? TextColor.Green : TextColor.Red;
-        System.out.println("    Health: " + entity.Health + " " + color + diff.health() + TextColor.Reset);
+        String sign = diff.health() > 0 ? "+" : "-";
+        System.out.println("    Health: " + entity.Health + " " + color + sign + Math.abs(diff.health()) + TextColor.Reset);
 
         color = diff.stamina() > 0 ? TextColor.Green : TextColor.Red;
-        System.out.println("    Stamina: " + entity.GetStamina() + " " + color + diff.stamina() + TextColor.Reset);
+        sign = diff.stamina() > 0 ? "+" : "-";
+        System.out.println("    Stamina: " + entity.GetStamina() + " " + color + sign + Math.abs(diff.stamina()) + TextColor.Reset);
 
         if (diff.lostShield()) {
             System.out.println("    Shield: " + entity.Shield.getName() + " " + TextColor.Red + "LOST" + TextColor.Reset);
@@ -104,12 +117,14 @@ public class SinglePlayerBattleEngine extends BattleEngine {
 
         if (entity.Shield != null) {
             color = diff.shieldHealth() > 0 ? TextColor.Green : TextColor.Red;
-            System.out.println("    Shield: " + entity.Shield.getName() + " " + color + diff.shieldHealth() + TextColor.Reset);
+            sign = diff.shieldHealth() > 0 ? "+" : "-";
+            System.out.println("    Shield: " + entity.Shield.getName() + " " + color + sign + Math.abs(diff.shieldHealth()) + TextColor.Reset);
         }
 
         if (entity.Costume != null) {
             color = diff.costumeHealth() > 0 ? TextColor.Green : TextColor.Red;
-            System.out.println("    Costume: " + entity.Costume.getName() + " " + color + diff.shieldHealth() + TextColor.Reset);
+            sign = diff.costumeHealth() > 0 ? "+" : "-";
+            System.out.println("    Costume: " + entity.Costume.getName() + " " + color + sign + Math.abs(diff.shieldHealth()) + TextColor.Reset);
         }
     }
 
@@ -157,6 +172,7 @@ public class SinglePlayerBattleEngine extends BattleEngine {
     }
 
     private void showMoveExplanation(FightMoves move, Entity performer, Entity receiver) {
+        System.out.print(TextColor.Cyan);
         switch (move) {
             case FightMoves.LIGHT_ATTACK -> System.out.println(performer.Name + " performs a light attack");
             case FightMoves.HEAVY_ATTACK -> System.out.println(performer.Name + " performs a heavy attack");
@@ -164,5 +180,6 @@ public class SinglePlayerBattleEngine extends BattleEngine {
             case FightMoves.HEAL -> System.out.println(performer.Name + " heals");
             case FightMoves.DEFEND -> System.out.println(performer.Name + " get their guard up!");
         }
+        System.out.print(TextColor.Reset);
     }
 }

Java-Knight/src/main/java/org/project/engine/SinglePlayerEngine.java

@@ -29,10 +29,10 @@ public class SinglePlayerEngine extends MainEngine {
         System.out.println(TextColor.Cyan + GetIntro() + ConsoleColor.Reset);
         System.out.println();
 
-        System.out.println("How should me call you, hero? ");
+        System.out.println("How should we call you, hero? ");
         String name = scanner.nextLine();
 
-        System.out.println("Greetings, " + name + ". May we know your role? \n");
+        System.out.println("Greetings, " + TextColor.Cyan + name + TextColor.Reset +". May we know your role? \n");
 
         player = RoleMenu(name);
 
@@ -46,7 +46,7 @@ public class SinglePlayerEngine extends MainEngine {
 
             boolean continueLoop = false;
             do {
-                System.out.println(GetLocationIntro(location));
+                System.out.println(TextColor.Cyan + GetLocationIntro(location) + TextColor.Reset);
                 System.out.println("What do you do, " + player.Name + "?");
                 System.out.println(
                         """
@@ -113,7 +113,7 @@ public class SinglePlayerEngine extends MainEngine {
             case Jungle jungle ->
                     player.Name + " enters the woods, after a few steps, they see a green goblin searching for food a few steps away";
             case GraveYard graveYard ->
-                    player.Name + " goes inside the grave ward, they cannot see a more than 10 steps ahead because of the fog in the air. After lurking through out the graves, the shadow appears... It's a skeleton!";
+                    player.Name + " goes inside the grave ward, they cannot see further than 10 steps ahead because of the fog in the air. After lurking through out the graves, the shadow appears... It's a skeleton!";
             case DarkCaves darkCaves ->
                     player.Name + " dives into the darkness. As our hero was going deeper, a black smoke appears, a vampire is nearby...";
             case Castle castle ->
@@ -125,7 +125,7 @@ public class SinglePlayerEngine extends MainEngine {
     public void MarketPlace() {
         Scanner scanner = new Scanner(System.in);
 
-        System.out.println("You've entered the marketplace, what would you like to do?");
+        System.out.println(TextColor.Cyan + "You've entered the marketplace, what would you like to do?" + TextColor.Reset);
         boolean wantsToStay = true;
         while (wantsToStay) {
             System.out.println("Money = " + player.GetMoney() + "\n");
@@ -137,15 +137,21 @@ public class SinglePlayerEngine extends MainEngine {
                     4 > Sell the costumes
                     5 > Sell the Weapons
                     6 > Buy shields
-                    7 > Buy shields
-                    8 > Buy shields
+                    7 > Buy weapon
+                    8 > Buy costume
                     9 > Exit
                     """);
 
             int choice = scanner.nextInt();
 
             switch (choice) {
-                case 0 -> DisplayItem.DisplayItems(player.GetInventory());
+                case 0 -> {
+                    if (player.GetInventory().isEmpty()) {
+                        System.out.println(TextColor.Red + "You do not have anything at the moment" + TextColor.Reset);
+                        break;
+                    }
+                    DisplayItem.DisplayItems(player.GetInventory());
+                }
                 case 1 -> {
                     player.SellByClass(ItemClass.UNNECESSARY);
                     System.out.println(TextColor.Green + "Unnecessary goods sold" + TextColor.Reset);
@@ -171,8 +177,13 @@ public class SinglePlayerEngine extends MainEngine {
 
                     System.out.println(TextColor.Blue + "Current shield: ");
                     ArrayList<Item> item = new ArrayList<>();
-                    item.add(player.Shield);
-                    DisplayItem.DisplayItems(item);
+                    if (player.Shield == null) {
+                        System.out.println(TextColor.Red + "You do not have a Shield" + TextColor.Reset);
+                    }
+                    else {
+                        item.add(player.Shield);
+                        DisplayItem.DisplayItems(item);
+                    }
                     System.out.println(TextColor.Reset);
 
                     ArrayList<Item> items = new ArrayList<>(Arrays.asList(Shields.getShields()));
@@ -185,7 +196,8 @@ public class SinglePlayerEngine extends MainEngine {
 
                     if (accessory != null) {
                         if (player.GetMoney() >= accessory.GetPrice()) {
-                            accessory.AttachTo(player);
+                            if (player.Shield != null) player.Shield.DeattachFrom(player, true);
+                            accessory.AttachTo(player, false);
                             player.ModifyMoney(accessory.GetPrice(), false);
                         }
                         else {
@@ -198,8 +210,13 @@ public class SinglePlayerEngine extends MainEngine {
 
                     System.out.println(TextColor.Blue + "Current weapon: ");
                     ArrayList<Item> item = new ArrayList<>();
-                    item.add(player.Weapon);
-                    DisplayItem.DisplayItems(item);
+                    if (player.Weapon == null) {
+                        System.out.println(TextColor.Red + "You do not have a Weapon" + TextColor.Reset);
+                    }
+                    else {
+                        item.add(player.Weapon);
+                        DisplayItem.DisplayItems(item);
+                    }
                     System.out.println(TextColor.Reset);
 
                     ArrayList<Item> items = new ArrayList<>(Arrays.asList(Weapons.getWeapons()));
@@ -212,7 +229,8 @@ public class SinglePlayerEngine extends MainEngine {
 
                     if (accessory != null) {
                         if (player.GetMoney() >= accessory.GetPrice()) {
-                            accessory.AttachTo(player);
+                            if (player.Weapon != null) player.Weapon.DeattachFrom(player, true);
+                            accessory.AttachTo(player, false);
                             player.ModifyMoney(accessory.GetPrice(), false);
                         }
                         else {
@@ -225,8 +243,13 @@ public class SinglePlayerEngine extends MainEngine {
 
                     System.out.println(TextColor.Blue + "Current costume: ");
                     ArrayList<Item> item = new ArrayList<>();
-                    item.add(player.Costume);
-                    DisplayItem.DisplayItems(item);
+                    if (player.Costume == null) {
+                        System.out.println(TextColor.Red + "You do not have a Costume" + TextColor.Reset);
+                    }
+                    else {
+                        item.add(player.Costume);
+                        DisplayItem.DisplayItems(item);
+                    }
                     System.out.println(TextColor.Reset);
 
                     ArrayList<Item> items = new ArrayList<>(Arrays.asList(Costumes.getCostumes()));
@@ -239,7 +262,8 @@ public class SinglePlayerEngine extends MainEngine {
 
                     if (accessory != null) {
                         if (player.GetMoney() >= accessory.GetPrice()) {
-                            accessory.AttachTo(player);
+                            if (player.Costume != null) player.Costume.DeattachFrom(player, true);
+                            accessory.AttachTo(player, false);
                             player.ModifyMoney(accessory.GetPrice(), false);
                         }
                         else {
@@ -255,7 +279,8 @@ public class SinglePlayerEngine extends MainEngine {
     public void InventoryView() {
         Scanner scanner = new Scanner(System.in);
 
-        System.out.println("You open your inventory, what would you like to do?");
+        System.out.println(TextColor.Cyan + "You open your inventory, what would you like to do?\n" + TextColor.Reset);
+
         boolean wantsToStay = true;
         while (wantsToStay) {
             System.out.println("Money = " + player.GetMoney() + "\n");
@@ -270,10 +295,20 @@ public class SinglePlayerEngine extends MainEngine {
             int choice = scanner.nextInt();
 
             switch (choice) {
-                case 0 -> DisplayItem.DisplayItems(player.GetInventory());
+                case 0 -> {
+                    if (player.GetInventory().isEmpty()) {
+                        System.out.println(TextColor.Red + "You do not have anything at the moment" + TextColor.Reset);
+                        break;
+                    }
+                    DisplayItem.DisplayItems(player.GetInventory());
+                }
                 case 1 -> {
                     System.out.println(TextColor.Blue + "Current shield: ");
                     ArrayList<Item> item = new ArrayList<>();
+                    if (player.Shield == null) {
+                        System.out.println(TextColor.Red + "You do not have a Shield" + TextColor.Reset);
+                        break;
+                    }
                     item.add(player.Shield);
                     DisplayItem.DisplayItems(item);
                     System.out.println(TextColor.Reset);
@@ -285,12 +320,17 @@ public class SinglePlayerEngine extends MainEngine {
                     Item shield = dictionary.get(index);
 
                     if (shield != null) {
-                        ((Accessory) shield).AttachTo(player);
+                        if (player.Shield != null) player.Shield.DeattachFrom(player, true);
+                        ((Accessory) shield).AttachTo(player, true);
                     }
                 }
                 case 2 -> {
                     System.out.println(TextColor.Blue + "Current weapon: ");
                     ArrayList<Item> item = new ArrayList<>();
+                    if (player.Weapon == null) {
+                        System.out.println(TextColor.Red + "You do not have a Weapon" + TextColor.Reset);
+                        break;
+                    }
                     item.add(player.Weapon);
                     DisplayItem.DisplayItems(item);
                     System.out.println(TextColor.Reset);
@@ -302,12 +342,17 @@ public class SinglePlayerEngine extends MainEngine {
                     Item weapon = dictionary.get(index);
 
                     if (weapon != null) {
-                        ((Accessory) weapon).AttachTo(player);
+                        if (player.Weapon != null) player.Weapon.DeattachFrom(player, true);
+                        ((Accessory) weapon).AttachTo(player, true);
                     }
                 }
                 case 3 -> {
                     System.out.println(TextColor.Blue + "Current costume: ");
                     ArrayList<Item> item = new ArrayList<>();
+                    if (player.Costume == null) {
+                        System.out.println(TextColor.Red + "You do not have a Costume" + TextColor.Reset);
+                        break;
+                    }
                     item.add(player.Costume);
                     DisplayItem.DisplayItems(item);
                     System.out.println(TextColor.Reset);
@@ -319,7 +364,8 @@ public class SinglePlayerEngine extends MainEngine {
                     Item costume = dictionary.get(index);
 
                     if (costume != null) {
-                        ((Accessory) costume).AttachTo(player);
+                        if (player.Costume != null) player.Costume.DeattachFrom(player, true);
+                        ((Accessory) costume).AttachTo(player, true);
                     }
                 }
                 case 4 -> wantsToStay = false;

Java-Knight/src/main/java/org/project/entity/players/Assassin.java

@@ -39,9 +39,7 @@ public class Assassin extends Player {
     @Override
     public void SpecialAbility(Entity entity) {
         ModifyStamina(SpecialAbilityStamina, false);
-        entity.SetState(EntityState.FROZEN);
         Damage(entity, GetDamage() * 3, new AttackPowerUp[]{AttackPowerUp.NO_DEFENSE});
-        Heal(MaxHealth/4);
     }
 
 

Java-Knight/src/main/java/org/project/entity/players/Knight.java

@@ -45,7 +45,7 @@ public class Knight extends Player {
 
     @Override
     public String GetSpecialAbilityDescription(Entity entity) {
-        return "Slam " + entity.Name + "with your unstoppable strength and stun them for the next turn";
+        return "Slam " + entity.Name + " with your unstoppable strength and stun them for the next turn";
     }
 
     @Override

Java-Knight/src/main/java/org/project/item/Accessory/Accessory.java

@@ -45,13 +45,13 @@ public abstract class Accessory extends SellableItem implements IDamageable, IAt
 
     @Override
     public void HandleZeroHealth() {
-        this.DeattachFrom(this.Owner);
+        this.DeattachFrom(this.Owner, false);
         this.Owner.Inventory.remove(this);
     }
 
     @Override
-    public abstract void AttachTo(Entity entity);
+    public abstract void AttachTo(Entity entity, boolean fromInventory);
 
     @Override
-    public abstract void DeattachFrom(Entity entity);
+    public abstract void DeattachFrom(Entity entity, boolean toInventory);
 }

Java-Knight/src/main/java/org/project/item/Accessory/Costume.java

@@ -35,14 +35,14 @@ public class Costume extends Accessory implements IDefender {
     }
 
     @Override
-    public void AttachTo(Entity entity) {
-        entity.RemoveFromInventory(this);
+    public void AttachTo(Entity entity, boolean fromInventory) {
+        if (fromInventory) entity.RemoveFromInventory(this);
         entity.Costume = this;
     }
 
     @Override
-    public void DeattachFrom(Entity entity) {
+    public void DeattachFrom(Entity entity, boolean toInventory) {
         entity.Costume = null;
-        entity.AddToInventory(this);
+        if (toInventory) entity.AddToInventory(this);
     }
 }

Java-Knight/src/main/java/org/project/item/Accessory/Shield.java

@@ -35,14 +35,14 @@ public class Shield extends Accessory implements IDefender {
     }
 
     @Override
-    public void AttachTo(Entity entity) {
-        entity.RemoveFromInventory(this);
+    public void AttachTo(Entity entity, boolean fromInventory) {
+        if (fromInventory) entity.RemoveFromInventory(this);
         entity.Shield = this;
     }
 
     @Override
-    public void DeattachFrom(Entity entity) {
+    public void DeattachFrom(Entity entity, boolean toInventory) {
         entity.Shield = null;
-        entity.AddToInventory(this);
+        if (toInventory) entity.AddToInventory(this);
     }
 }

Java-Knight/src/main/java/org/project/item/Accessory/Weapon.java

@@ -17,14 +17,14 @@ public class Weapon extends Accessory implements IDamageUtil {
     }
 
     @Override
-    public void AttachTo(Entity entity) {
-        entity.RemoveFromInventory(this);
+    public void AttachTo(Entity entity, boolean fromInventory) {
+        if (fromInventory) entity.RemoveFromInventory(this);
         entity.Weapon = this;
     }
 
     @Override
-    public void DeattachFrom(Entity entity) {
+    public void DeattachFrom(Entity entity, boolean toInventory) {
         entity.Weapon = null;
-        entity.AddToInventory(this);
+        if (toInventory) entity.AddToInventory(this);
     }
 }

Java-Knight/src/main/java/org/project/util/DisplayItem.java

@@ -15,6 +15,8 @@ import java.util.Hashtable;
 public class DisplayItem {
     public static void DisplayItems(ArrayList<Item> items) {
         for (Item item : items) {
+            if (item == null) continue;
+
             String result = item.getName();
 
             if (item instanceof SellableItem) {
@@ -30,7 +32,7 @@ public class DisplayItem {
             }
 
             if (item instanceof IDefender) {
-                result += "\n    Damage = " + ((IDefender) item).GetDefense();
+                result += "\n    Defence = " + ((IDefender) item).GetDefense();
             }
 
             System.out.println(result);
@@ -42,6 +44,8 @@ public class DisplayItem {
         Dictionary<Integer, Item> dictionary = new Hashtable<>();
 
         for (Item item : items) {
+            if (item == null) continue;
+
             String result = index + " > " + item.getName();
 
             if (item instanceof KeyItem) {
@@ -61,7 +65,7 @@ public class DisplayItem {
             }
 
             if (item instanceof IDefender) {
-                result += "\n    Damage = " + ((IDefender) item).GetDefense();
+                result += "\n    Defence = " + ((IDefender) item).GetDefense();
             }
 
             dictionary.put(index, item);