【janken.RandomTacitcs cannot be resolved to a type】Javaのエラー

package Ovject;

public class janken {
    // インターフェースの作成
    public interface Tactis {
        public int readTactis(); // メソッドの作成
    }
    
    // ランダムに手を決める戦略クラス.インタフェースをじっそうする
    public class Player {
        public int stone = 0;
        int scissors = 1;
        int paper = 2;

        private String name_;
        private int Wincount_ = 0;

        private Tactis tactis_;

        // コンストラクタ
        Player(String name_) {
            this.name_ = name_;
        }
        void SetTactics(Tactis tactis) {
            tactis_ = tactis;
        }
        
        // showHandを実行するのではなく、readTactisを実行するようにする
        int showHand() {
            int hand = tactis_.readTactis();
            return hand;
        }
        public class RandomTacitcs implements Tactis {
            public int readTactis() {
                double num = Math.random() * 3;
                int hand = 0;
                if (num < 1) {
                    hand = stone;
                    System.out.println("ぐー");
                } else if (num < 2) {
                    hand = scissors;
                    System.out.println("ちょき");
                } else {
                    hand = paper;
                    System.out.println("パー");
                }
                return hand;
            }
        }
        // メソッド
        public void notifyResult(boolean result) {
            if (result = true) {
                Wincount_++;
            }
        }

        public String getName() {
            return name_;
        }

        public int getWincount() {
            return Wincount_;
        }
    }

    public class Judge {
        // メソッド
        public void StartJunken(Player player1, Player player2) {
            System.out.println("ジャンケンを開始します");
            for (int i = 0; i < 3; i++) {
                System.out.println(i + "回戦");
                Player winner = judgeJanken(player1, player2);
                if (winner != null) {
                    System.out.println(winner.getName() + "が勝ちました");
                } else {
                    System.out.println("引き分けです");
                }
            }
            System.out.println("じゃんけんを終了しました！");
            Player finalWinner = judgeFinalWinner(player1, player2);
            if (finalWinner != null) {
                System.out.println(finalWinner.getName() + "の勝ちです！");
            } else {
                System.out.println("引き分けです！");
            }
        }

        private Player judgeJanken(Player player1, Player player2) {
            Player winner = null;
            int playerhand1 = player1.showHand();
            int playerhand2 = player2.showHand();
            if (playerhand1 == player1.stone && playerhand2 == player2.scissors
                    || playerhand1 == player1.scissors
                    && playerhand2 == player2.paper
                    || playerhand1 == player1.paper
                    && playerhand2 == player2.stone) {
                winner = player1;
                player1.Wincount_++;
            } else if (playerhand2 == player1.stone
                    && playerhand1 == player2.scissors
                    || playerhand2 == player1.scissors
                    && playerhand1 == player2.paper
                    || playerhand2 == player1.paper
                    && playerhand1 == player2.stone) {
                winner = player2;
                player2.Wincount_++;
            }
            return winner;
        }

        private Player judgeFinalWinner(Player player1, Player player2) {
            Player wineer = null;
            int player1Wincounr = player1.getWincount();
            int player2Wincounr = player2.getWincount();
            if (player1Wincounr > player2Wincounr) {
                wineer = player1;
            } else if (player1Wincounr < player2Wincounr) {
                wineer = player2;
            } else {
                return null;
            }
            return wineer;
        }
    }

    public class Yamada extends Player {
        public Yamada(String name_) {
            super(name_);
        }

        public int showHand() {
            System.out.println("ぐー");
            return stone;
        }
    }

    public class Murata extends Player {
        public Murata(String name_) {
            super(name_);
        }

        public int showHand() {
            System.out.println("ぱー");
            return paper;
        }
    }
    
    public static void main(String[] args) {
        janken j = new janken();
        Judge saito = j.new Judge();
        Player murata = j.new Murata("村田さん");
        Player yamada = j.new Yamada("山田さん");
                ///エラー部分
        Tactis murataTactis = j.new RandomTacitcs();
        murata.SetTactics(murataTactis);
        saito.StartJunken(murata, yamada);
    }
}