如何调用我的方法以从整个类的.txt文件返回随机单词？

Question

我正在创建一个程序，可以从.txt文件中读取四个字母单词。 玩家在玩游戏时说“是”时，计算机将随机选择一个整数，然后从.txt文件中的该行选择单词。 然后将给玩家7次尝试猜单词的机会。 我遇到的麻烦是能够调用我的RandomWordProvider类中的方法，该方法将返回随机整数，然后返回相应的单词。 这是我所做的：

public class WordGuessingGame2 {

    static class RandomWordProvider {

        public final List<String> words;

        public RandomWordProvider() {
            words = readFile();
        }

        public int randomInteger() {
            int randomInt = (int) (Math.random() * words.size());
            return randomInt;
        }

        public String getWord(int randomInt, String line) {
            int randomPosition = randomInteger();
            String randomWord = words.get(randomPosition);
            return randomWord;
        }

        private List<String> readFile() {

            List<String> wordsList = new ArrayList<>();

            try {
                File fourLetterWords = new File(System.getProperty("user.home"),"Documents/FourLetterWords.txt");
                Scanner in = new Scanner(fourLetterWords);

                while (in.hasNextLine()) {
                    String line = in.nextLine();
                    if (line!=null && !line.isEmpty()) {
                        wordsList.add(line);
                    }
                }
            } 
            catch (FileNotFoundException ex) {
                System.out.println("File not found.");
            }
            return wordsList ;
        }
    }

    static class PlayerCharacterEntry {

        public String playerEntry() {
            Scanner characterEntry = new Scanner(System.in);
            System.out.print("Enter a character: ");
            String playerInput = characterEntry.next();
            playerInput = playerInput.toUpperCase();
            return playerInput;
        }
    }

    public static void main(String[] args) {

        Scanner wantToPlay = new Scanner(System.in);
        System.out.print("Welcome to the word guessing game! Would you like to play? ");
        String playerAnswer = wantToPlay.next();

        if (playerAnswer.equalsIgnoreCase("Yes")) {
            System.out.print("\nYour objective is to guess a four letter word by entering"
                + "\nletters on your keyboard. If you can not guess the word in seven attempts,"
                + "\nyou lose! You will be told if the letter you entered is in the word, and"
                + "\nyou will be told if the letter you entered is not in the word. You will be"
                + "\nallowed to guess the word any time during your seven attempts. If at anytime"
                + "\nyou would like to terminate the game, enter the word 'terminate'. Good Luck!"
                + "\n \n");
        }
        if (playerAnswer.equalsIgnoreCase("No")) {
            System.out.print("Maybe another time!");
            System.exit(0);
        }

        RandomWordProvider randomWordProvider = new RandomWordProvider();
        PlayerCharacterEntry playerCharacterEntry = new PlayerCharacterEntry();

        playerCharacterEntry.playerEntry();

    }
}

现在，在底部的底部，我创建了实例，现在试图将我的randomInteger和getWord方法调用到我的main方法中，但是我不知道该怎么做。 我一直对需要包含在getWord方法中的参数感到困惑。 如果有人可以告诉我该怎么做，将不胜感激！

Answer 1

您的第一个问题是，当前的getWord(...)方法作为公共接口没有意义，因为您依赖于该类来生成随机数并读取文件。 因此，尽管可以，您不必发送此信息； 对于您的配置，它根本行不通，或者没有任何区别。

因此，答案是，您需要一种不带任何参数并返回字符串的方法。 允许您的代码执行所需的操作。

public String getWord() {...}

但是随后在main()您需要保留字符串一段时间，直到用户用尽所有猜测为止。

String word = randomWordProvider.getWord();