Set集合比较文件差异

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

public class FileComparison {
    public static void main(String[] args) {
        // 读取文件a和b的内容到Set集合中
        Set<String> a = readFileToSet("C:\\Users\\Administrator\\Desktop\\demo\\1.txt");
        Set<String> b = readFileToSet("C:\\Users\\Administrator\\Desktop\\demo\\2.txt");

        // 从a集合中移除b集合的内容
        a.removeAll(b);

        // 输出只在a集合中存在的元素
        System.out.println("只在a集合中存在的元素： " + a);
    }

    private static Set<String> readFileToSet(String fileName) {
        Set<String> resultSet = new HashSet<>();
        try {
            File file = new File(fileName);
            Scanner scanner = new Scanner(file);
            while (scanner.hasNextLine()) {
                resultSet.add(scanner.nextLine());
            }
            scanner.close();
        } catch (FileNotFoundException e) {
            System.out.println("文件未找到： " + fileName);
            e.printStackTrace();
        }
        return resultSet;
    }
}

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