java - 无法设法获得字数？

本质上，我试图获取我已经添加到数组列表中的单词的单词计数
（使用addWord方法）。起初我尝试使用流，但是我放弃了，现在我试图使用相对简单的迭代器方法。我只是无法使其工作（我总是得到0）。任何帮助，将不胜感激

主要方法

import java.util.List;

/**
 * A simple 'driver' for the WordAnalyser class.
 *
 * Split a 'document' into individual words and pass them
 * to a WordAnalyser to be analysed.
 *
 * In this example, the 'document' is a String literal in
 * the main method, but this could easily be changed to an
 * external file, if desired (e.g., use a Scanner).
 *
 * Print a few sample statistics.
 *
 */
public class WordAnalyserMain
{
    public static void main(String[] args)
    {
        String document =
            "The first day of the third month was always difficult for Joy because there was little to look forward to in the month of March.";
        String[] words = document.split("[ ,.;:?]+");
        WordAnalyser analyser = new WordAnalyser();
        for(String word : words) {
            analyser.addWord(word);
        }
        for(String word : List.of("The", "the", "joy", "was")) {
            System.out.println(word);
            System.out.println("    " + analyser.getCount(word));
            System.out.println("    " + analyser.getCaseInsensitiveCount(word));
            System.out.println("    " + analyser.followedBy(word, "month"));
        }
    }
}

到目前为止我的wordAnalyser类

import java.util.*;
/**
 * Keep track of word counts and word pairs.
 *
 * @author
 * @version
 */
public class WordAnalyser
{
    private HashMap<String,Integer> counts;
    private ArrayList<String> WordAnalyser;
    private String wordCounts;
    private String Sentences;
    private int count;
    private Map<String, Integer> wordCount = new HashMap<String, Integer>();

    /**
     * Constructor for objects of class WordAnalyser
     */
    public WordAnalyser()
    {
        counts = new HashMap<>();
        WordAnalyser = new ArrayList<>();
    }

    /**
     * Uses a for each loop to add the input, starting from 0
     */
    public void addWord(String input)
    {
        WordAnalyser.add(input);
        this.counts = counts;
        for (String word : WordAnalyser)
        {
            int counter = counts.getOrDefault(word , 0);
            counts.put(word,counter +1);
            System.out.println(input);

        }
    }

    /**
     * Get the number of times the given word has been seen.
     * @param word The word to be looked up.
     * @return The number of times the word has been seen.
     */

    public int getCount(String word)
    {
        Map<String, Integer> wordCount = new HashMap<String, Integer>();
        this.count=count;
        for(String words: WordAnalyser) {
            Integer count = wordCount.get(words);
            wordCount.put(words, (count== null) ? 1 : count+1);

        }
        return count;
    }

}

最佳答案

如果我正确理解您的意见：

private Map<String, Integer> save;

public void addWord(String word) {
    if(save.containsKey(word)) {
        save.put(word, save.get(word)+1);
    } else {
        save.put(word, 1);
    }
}

public int getCount(String word) {
    return save.containsKey(word) ? save.get(word) : 0;
}

关于java - 无法设法获得字数？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59707295/