java - 在单词争夺游戏的 final方法中从字符串生成器获取返回类型时遇到问题

Question

我必须制作一个单词扰乱器“游戏”，并且我拥有需要使用的所有方法。我仍然需要在主方法中添加代码来要求用户猜测并使用 .equals 来查看它是否是正确的单词。那不是问题。我的 scrambleWord(word) 方法遇到问题。我使用了字符串生成器，但不知道如何返回。代码看起来不错并且可以构建，但说有一个错误。有人可以帮忙吗？这是我现在的代码。

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

 /**
 *
 * @author Brian2
 */
 public class Project3 {

/**
 * @param args the command line arguments
 * @throws java.io.IOException
 */
public static void main(String[] args) throws IOException {

    //Shuffle s = new Shuffle();
      //  s.shuffle("hello");

    String[] words = createListOfWords();
    String word = chooseRandomWord(words);
    String scrambledWord = scrambleWord(word);
    System.out.println(scrambledWord);

    /* code for asking userers guess
    *
    *use .equals
    *
    *
    */

}
double[] wordList = new double[65573];

private static String[] createListOfWords() throws FileNotFoundException, IOException {
    BufferedReader in = new BufferedReader(new FileReader("wordlist.txt"));
    String str;

    List<String> list = new ArrayList<String>();
    while ((str = in.readLine()) != null) {
        list.add(str);
    }

    String[] stringArr = list.toArray(new String[0]);

    // test to see if array stored--System.out.println(Arrays.toString(stringArr));
    return stringArr;

}

/**
 *
 * @param words
 * @return
 */
private static String chooseRandomWord(String[] words) {

    int index = new Random().nextInt(words.length);

    String word = words[index];

    return word;
}

private static String scrambleWord(String word) {

    char[] charArray = word.toCharArray();



        List<Character> characters = new ArrayList<>();

        StringBuilder scrambledWord = new StringBuilder(word.length());

            int randPicker = (int) (Math.random() * characters.size());
    StringBuilder append = scrambledWord.append(characters.remove(randPicker));




/*for (int i = charArray.length - 1; i > 0; i--) { 
 int j = ((int)(Math.random())(i + 1));

 double scrambledWord = charArray[i];
 charArray[i] = charArray[j];
 charArray[j] = (char) scrambledWord;
 }*/

return scrambledWord.toString() ;
/*This method should take a word as an argument, and return the 
 same word, except scrambled. In order to scramble a word, convert 
 it to an array of chars, like this:*/
    //char[] charArray = word.toCharArray();

 }

  }

Answer 1

您从未在 scrambleWord 中的List 中添加任何字符。我会使用 Collections.shuffle(List)和类似的东西

private static String scrambleWord(String word) {
    List<Character> characters = new ArrayList<>();
    for (char ch : word.toCharArray()) {
        characters.add(ch);
    }
    Collections.shuffle(characters);
    StringBuilder sb = new StringBuilder();
    for (char ch : characters) {
        sb.append(ch);
    }
    return sb.toString();
}