Java程序统计文件中的大写字母单词出现次数并排序

package Chapter10_NumOfName;

public class StringOperation {
    public static String[] split(String s) {
        String afterOperation = eraseMeaninglessWord(s);
        return afterOperation.split(" ");
    }

    public static String eraseMeaninglessWord(String s) {
        s = s.replace("Mr.", " ");
        s = s.replace("Mrs.", " ");
        s = s.replace("'m", " ");
        s = s.replace("I", " ");
        s = s.replace("", " "); // 这一行应该删除
        s = s.replace("'", " ");
        s = s.replace(".", " ");
        s = s.replace(".\"", " ");
        s = s.replace("\"", " ");
        s = s.replace(",", " ");
        s = s.replace(";", " ");
        s = s.replace("?", " ");
        s = s.replace("!", " ");
        return s;
    }

    public static boolean firstCharIsCapital(String s) { // 将方法名改为firstCharIsCapital
        if (s.isEmpty()) {
            return false;
        }
        return Character.isUpperCase(s.charAt(0));
    }

    public static String[] capitalCharStringArray(String[] s) {
        String[] capitalStringArray = new String[10];
        int size = 0;
        for (String str : s) {
            if (firstCharIsCapital(str)) {
                if (size >= capitalStringArray.length) {
                    String[] tempString = new String[capitalStringArray.length * 2];
                    System.arraycopy(capitalStringArray, 0, tempString, 0, capitalStringArray.length);
                    capitalStringArray = tempString;
                }
                capitalStringArray[size] = str;
                size++;
            }
        }
        return capitalStringArray;
    }

    public static Name[] bubbleSort(Name[] names) {
        for (int i = 0; i < names.length; i++) {
            for (int j = i + 1; j < names.length; j++) { // 将第二个循环的i改为j
                if (names[i].count < names[j].count) {
                    Name temp = names[i];
                    names[i] = names[j];
                    names[j] = temp;
                }
            }
        }
        return names;
    }
}

package Chapter10_NumOfName;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class FileOperation {
    public static String readFromFile(File f) throws FileNotFoundException {
        Scanner input = new Scanner(f);
        StringBuilder result = new StringBuilder(); // 使用StringBuilder来拼接字符串
        while (input.hasNextLine()) {
            result.append(input.nextLine()).append("\n"); // 每行读入后加上换行符
        }
        input.close();
        return result.toString();
    }

    public static void writeToFile(File f, String[] s) throws FileNotFoundException {
        try (PrintWriter output = new PrintWriter(f)) { // 使用try-with-resources语句
            for (String str : s) {
                if (!str.isEmpty()) {
                    output.println(str);
                }
            }
        }
    }
}

package Chapter10_NumOfName;

public class Name {
    private String name;
    private int count;

    public Name(String name, int count) {
        this.name = name;
        this.count = count;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getCount() {
        return count;
    }

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

    public void increaseCount() {
        this.count++;
    }
}

package Chapter10_NumOfName;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Arrays;

public class Test2 {
    public static void main(String[] args) throws FileNotFoundException {
        File inputFile = new File("1.txt");
        String fileContent = FileOperation.readFromFile(inputFile);
        String[] words = StringOperation.split(fileContent);
        String[] capitalWords = StringOperation.capitalCharStringArray(words);

        File outputFile = new File("2.txt");
        FileOperation.writeToFile(outputFile, capitalWords);

        Name[] names = new Name[capitalWords.length];

        int index = 0;

        for (String word : capitalWords) {
            if (!word.isEmpty()) {
                boolean flag = false;
                int k = 0;
                for (int j = 0; j < index; j++) {
                    if (names[j].getName().equals(word)) {
                        flag = true;
                        k = j;
                        break;
                    }
                }
                if (flag) {
                    names[k].increaseCount();
                } else {
                    names[index] = new Name(word, 1);
                    index++;
                }
            }
        }

        names = StringOperation.bubbleSort(Arrays.copyOf(names, index));

        for (int i = 0; i < 20 && i < names.length && names[i].getCount() != 0; i++) {
            System.out.println(names[i].getName() + " " + names[i].getCount());
        }
    }
}