线程main中的异常：该类型的方法未定义

Question

我正在创建骰子游戏模拟，但遇到以下错误：

exception in thread "main" java.lang.Error: Unresolved compilation problem: 
    The method displayGrandWinner(Player, Player) is undefined for the type ChoHan

我将在下面发布该类的所有代码，因为我不确定错误在哪里，但是我认为唯一必要的代码是displayGrandWinner方法： 导入java.util.Scanner;

public class ChoHan {

    public static void main(String[] args) {
        final int MAX_ROUNDS = 5; // Number of rounds 
        String player1Name;  // First player's name
        String player2Name; //Second player's name

         // Create a Scanner object for keyboard input
        Scanner keyboard = new Scanner(System.in);


        //Get the player's names
        System.out.println("Enter the firs tplayers name:");
        player1Name = keyboard.nextLine();
        System.out.println("Enter the second players name:");
        player2Name = keyboard.nextLine();

        //Create the dealer
        Dealer dealer = new Dealer();

        //Create the two players
        Player player1 = new Player(player1Name);
        Player player2 = new Player(player2Name);

        //play the rounds
        for(int round = 0; round < MAX_ROUNDS; round++){

            System.out.println("--------------------------");
            System.out.printf("Now playing round %d.\n", round+1);

            //roll the dice 
            dealer.rollDice();

            //the players make their guesses
            player1.makeGuess();
            player2.makeGuess();

            //determine the winner of this round
            roundResults(dealer, player1, player2);
        }

        //Display the grand winner 
        displayGrandWinner(player1, player2);
    }

    /**
     * The roundResults method determines the results of the current round
     * @param dealer The Dealer object
     * @param player1 Player #1 object
     * @param player2 Player #2 object
     */

    public static void roundResults(Dealer dealer, Player player1, Player player2){
        //Show the dice values
        System.out.printf("The dealer rolled %d and %d.\n", dealer.getDie1Value(), dealer.getDie2Value());
        System.out.printf("Result: %s\n", dealer.getChoOrHan());

        //Check each players guess and award points 
        checkGuess(player1, dealer);
        checkGuess(player2, dealer);
    }

    /**
     * The checkGuess method checks a player's guess against the dealer's result.
     * @param player The Player object to check 
     * @param dealer The Dealer object
     */

    public static void checkGuess(Player player, Dealer dealer){
        final int POINTS_TO_ADD = 1; //points to award the winner
        String guess = player.getGuess(); //player's guess
        String choHanResult = dealer.getChoOrHan(); //Cho or Han

        //display the player's guess
        System.out.printf("The player %s guessed %s\n", player.getName(), player.getGuess());

        //award points if the player guessed correctly
        if(guess.equalsIgnoreCase(choHanResult)){
            player.addPoints(POINTS_TO_ADD);
            System.out.printf("Awarding %d points to %s\n", POINTS_TO_ADD,player.getName());
        }

        /**
         * The displayGrandWinner method displays the games grand winner
         * @param player1 Player #1
         * @param player2 Player #2
         */

    public static void displayGrandWinner(Player player1, Player player2){
        System.out.println("----------------------------");
        System.out.println("Game over. Here are the results:");
        System.out.printf("%s: %d points.\n", player1.getName(), player1.getPoints());
        System.out.printf("%s: %d points.\n", player2.getName(), player2.getPoints());

        if(player1.getPoints() > player2.getPoints())
            System.out.println(player1.getName() +" is the winner");
        else if(player2.getPoints() > player1.getPoints()) 
            System.out.println(player2.getName() +" is the winner");
        else
            System.out.println("Tie");

        }
    }


}

为什么displayGrandWinner方法没有注册为ChoHan类的一部分？