Question

我停留在一段代码上，该代码将从文本文件中读取输入，然后计算某个单词出现的次数。我已经获得了4个班级TextReader。 TextReader类读取输入文件，名为readNextWord的方法将返回输入文件中的下一个单词。 WordCount，WordCollecter（我被困的那个）和DisplayWords。

对于WordCollector类，我有以下代码：

public class WordCollector {

TextReader reader;
ArrayList countWord;
DisplayWords display;

public WordCollector(String word)
{
    TextReader reader = new TextReader(word);
    ArrayList<WordCount> countWord = new ArrayList<WordCount>(); 
    DisplayWords display = new DisplayWords();

}

我需要编写一个私有方法来读取TextReader中的单词，构造WordCounts并将它们存储在ArrayList中，并保留读入的单词总数的计数。WordCollector的构造函数应该调用私有方法，确保完全读入输入文件，并在构造WordCollector时完成所有频率计数。我似乎无法理解这一部分。

这是一个例子，但这只使用一个类：

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.Collections;

public class reader
{

public void main(String name)
{
    FileReader fr = null;
    BufferedReader br =null;

    String [] stringArray;
    int counLine = 0;
    int arrayLength ;
    String s="";
    String stringLine="";
    try{
        fr = new FileReader(name);
        br = new BufferedReader(fr);
        while((s = br.readLine()) != null){
            stringLine = stringLine + s;
            stringLine = stringLine + " ";/*Add space*/
            counLine ++;
        }

        stringArray = stringLine.split(" ");
        arrayLength = stringArray.length;
        System.out.println("There are "+arrayLength + " words");
        /*Duplicate String count code */
        for (int i = 0; i < arrayLength; i++) {
            int c = 1 ;
            for (int j = i+1; j < arrayLength; j++) {
                if(stringArray[i].equalsIgnoreCase(stringArray[j])){
                    c++;
                    for (int j2 = j; j2 < arrayLength; j2++) {
                        stringArray[j2] = stringArray[j2+1];
                        arrayLength = arrayLength - 1;
                    }

                }//End of If block
            }//End of Inner for block
            System.out.println(stringArray[i]+" appears "+c+" times .");
        }//End of Outer for block
        System.out.println("The number of Lines is "+counLine);
        System.out.println();
        fr.close();
        br.close();
    }catch (Exception e) {
        e.printStackTrace();
    }

}

}

Answer 1

您尚未明确定义自己的问题。对我而言，这看起来像是一项任务。因为你是新人，我会提供一些指导。

您必须使用OOP（面向对象编程）。

我提供了完整的工作代码。使用此指南并根据您的要求进行修改。

字数

package tutorial;

public class WordCount {

    private String word;
    private int count;



    public WordCount(String word, int count) {
        super();
        this.word = word;
        this.count = count;
    }

    public String getWord() {
        return word;
    }

    public void setWord(String word) {
        this.word = word;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

}

Word Collector

package tutorial;

import java.io.File;
import java.io.IOException;

public class WordCollector {

    private TextReader textReader;

    public WordCollector(File file) throws IOException {
        textReader = new TextReader(file);
    }

    public WordCount getWordCounts(String inputWord) {
        String[] extractWords = textReader.extractWords();
        int totalCount = 0;
        for (String word : extractWords) {
            if (inputWord.equals(word)) {
                totalCount++;

            }
        }

        return new WordCount(inputWord, totalCount);

    }

}

TextReader（这使用Apache FileUtil库来读取文件）

FileUtil Docs 包教程;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;

public class TextReader {

    private String fileString;

    public TextReader(File file) throws IOException {
        fileString = FileUtils.readFileToString(file);
    }

    public String[] extractWords() {
        return fileString.split(" ");
    }

}

<强> DisplayWord

package tutorial;

import java.io.File;
import java.io.IOException;

public class DisplayWord {

    private WordCollector wordCollector;

    public DisplayWord(File inputFile) throws IOException {
        wordCollector = new WordCollector(inputFile);
    }

    public void displayCountWord(String word) {
        WordCount wordCounts = wordCollector.getWordCounts(word);
        System.out.println("The word " + word + " has appeared "
                + wordCounts.getCount() + " times");
    }

}

快速测试

package test;

import java.io.File;
import java.io.IOException;

import org.junit.Test;

import tutorial.DisplayWord;

public class TestWordCount {

    @Test
    public void test() throws IOException {

        DisplayWord displayWord = new DisplayWord(new File("D://test.txt"));

        displayWord.displayCountWord("Church");
    }

}

示例文本文件

Bond is a bad boy.Bond goes to temple EveryDay.Then bond everday goes to Church Church is a good place for people
lab lab lab

<强>输出

The word Church has appeared 2 times

计算输入文件中的单词

1 个答案: