Getting these errors in my code I am getting error that "cannot find symbol WarPlayer." also getting error: cannot final symbol symbol: method getCardDeck( location: variable deck of type GroupOfCards

public class WarGame extends Game{ private GroupOfCards deck; final ArrayList warPool = new ArrayList<>(); private Player Player1; private Player Computer; final int cardsInDeck = 52; private Player GameWinner = null; public WarGame() { super("War"); } /** * Creates an ArrayList using the player controlled object and the computer controlled object. * This method ensures that the game is limited to 1 player and 1 computer. * * @param user */ public void createPlayerList(Player user) { Player computer = new WarPlayer("Computer"); ArrayList playerList = new ArrayList(); playerList.add(user); this.Player1 = user; playerList.add(computer); this.Computer = computer; setPlayers(playerList); } @Override public void play() { System.out.println(""); System.out.println("Starting game!"); // Instantiate GroupOfCards to create deck made up of 52 cards deck = new GroupOfCards(cardsInDeck); // Populates the deck of cards, 4 suits and 13 cards for each suit for (int r = 1; r < 14; r++) { for (int c = 0; c < 4; c++) { deck.getCardDeck().add(new Card(r, Card.suits[c])); } } // Call shuffle method from GroupOfCards and shuffle deck deck.shuffle(); System.out.println("Deck built and shuffled!"); // Create 2 ArrayList's based on the shuffled cards in the deck (one for the user, one for the computer) ArrayList userCards = new ArrayList<>(); ArrayList computerCards = new ArrayList<>(); // Even cards are added to user ArrayList, odd cards are added to computer ArrayList for (int i = 0; i < deck.getCardDeck().size(); i++) { if (i % 2 == 0) { userCards.add(deck.getCardDeck().get(i)); } else { computerCards.add(deck.getCardDeck().get(i)); } } // Create 2 GroupOfCards deck objects using the size of the 2 ArrayLists GroupOfCards playerDeck = new GroupOfCards(userCards.size()); GroupOfCards computerDeck = new GroupOfCards(computerCards.size()); // Set the cards in these GroupOfCards objects to the ones that were placed in the 2 ArrayLists earlier playerDeck.setCardDeck(userCards); computerDeck.setCardDeck(computerCards); // Give the 2 GroupsOfCards to the player objects Player1.setCards(playerDeck); Computer.setCards(computerDeck); // Clear the userCards ArrayList and the computerCards ArrayList to be used as each players discard pile userCards.clear(); computerCards.clear(); System.out.println("Deck split and distributed!"); System.out.println(""); // Draw the top card in each players deck int index = 0; boolean runGame = true; while (runGame) { // When a player runs out of cards, the game ends if (Player1.getCards().getSize() == 0 || Computer.getCards().getSize() == 0) { runGame = false; break; } System.out.println("Drawing cards!"); // Draws top card of both players decks Card playerTopCard = Player1.getCards().getTopCard(); System.out.println(Player1.getName() + " drew: " + playerTopCard.toString()); Card computerTopCard = Computer.getCards().getTopCard(); System.out.println(Computer.getName() + " drew: " + computerTopCard.toString()); System.out.println(""); //Compares the 2 cards that were drawn System.out.println("Comparing cards!"); Player roundWinner = compareCards(playerTopCard, computerTopCard); if (roundWinner == Player1) { System.out.println(Player1.getName() + " wins the hand!"); userCards.add(playerTopCard); userCards.add(computerTopCard); } else if (roundWinner == Computer) { System.out.println(Computer.getName() + " wins the hand!"); computerCards.add(playerTopCard); computerCards.add(computerTopCard); } else { System.out.println("Stalemate! Cards added to pot."); System.out.println(""); warPool.add(playerTopCard); warPool.add(computerTopCard); startWar(userCards, computerCards); } System.out.println(""); index++; } if (userCards.size() > computerCards.size()) { GameWinner = Player1; } else if (userCards.size() < computerCards.size()) { GameWinner = Computer; } } public Player compareCards(Card playerCard, Card computerCard) { // Holds the value of each card in a variable so that it can be referenced quickly int playerCardValue = playerCard.getCardNum(); int computerCardValue = computerCard.getCardNum(); // Checks if the value of the cards are equal if (playerCardValue != computerCardValue) { // if they are not equal, the winner will be the player with the higher value card if (playerCardValue > computerCardValue) { return Player1; } else { return Computer; } // if they are equal, the players go to war } else { return null; } } public void startWar(ArrayList userCard, ArrayList computerCard) { System.out.println("War has broken out! Each player draws 4 cards."); if (Player1.getCards().getSize() > 3 && Computer.getCards().getSize() > 3) { int war = 3; // 3 Cards into the pool for (int i = 0; i < war; i++) { warPool.add(Player1.getCards().getTopCard()); warPool.add(Computer.getCards().getTopCard()); } } Card playerFinalCard = Player1.getCards().getTopCard(); System.out.println(Player1.getName() + "'s top card is: " + playerFinalCard.toString()); Card computerFinalCard = Computer.getCards().getTopCard(); System.out.println(Computer.getName() + "'s top card is: " + computerFinalCard.toString()); warPool.add(playerFinalCard); warPool.add(computerFinalCard); System.out.println(""); Player warWinner = compareCards(playerFinalCard, computerFinalCard); if (warWinner == Player1) { System.out.println(Player1.getName() + " wins the war! Pot goes to winner!"); userCard.addAll(warPool); warPool.clear(); } else if (warWinner == Computer) { System.out.println(Computer.getName() + " wins the war! Pot goes to winner!"); computerCard.addAll(warPool); warPool.clear(); } else { System.out.println("Stalemate! A new war will soon breakout..."); startWar(userCard, computerCard); } System.out.println(""); } @Override public void declareWinner() { if (GameWinner == null) { System.out.println("No winner!"); } else if (GameWinner == Player1) { System.out.println("Winner is Player 1."); } else if (GameWinner == Computer) { System.out.println("Winner is Computer."); } } } getting error Player computer = new WarPlayer("Computer");