Script to check the most changed folder in the repository at different levels

ChangesCount.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;

class ChangesCount {
    public static void main(String[] args) throws IOException {
        List<String> paths = readPaths();
        for (int i = 1; i <= 5; i++) {
            System.out.println("------------");
            System.out.println("LEVEL " + i);
            System.out.println("------------");

            changeCount(paths, i);

            System.out.println();
            System.out.println();
        }
    }

    private static void changeCount(List<String> paths, int levels) {
        HashMap<String, Integer> changeCount = new HashMap<>();
        Set<String> uniqueL1FolderFileNamesSet = new HashSet<>();
        for (String path : paths) {
            String[] split = path.split("/");
            String firstPath = split[0].toLowerCase(Locale.ROOT);
            if (isDirectory(firstPath)) {
                try {
                    StringBuilder parentPathBuilder = new StringBuilder(firstPath);
                    for (int i = 1; i < levels; i++) {
                        parentPathBuilder.append('/')
                            .append(split[i]);
                    }
                    String pathBuilder = parentPathBuilder.toString();
                    uniqueL1FolderFileNamesSet.add(pathBuilder);
                    changeCount.put(pathBuilder, changeCount.getOrDefault(pathBuilder, 0) + 1);
                } catch (Exception e) {
//                    System.out.println("failed for path " + path);
                }
            }
        }

        List<String> uniqueL1FolderFileNames = new ArrayList<>(uniqueL1FolderFileNamesSet);
        uniqueL1FolderFileNames.sort(Comparator.comparingInt(changeCount::get).reversed());

        StringBuilder result = new StringBuilder("Names\t:\tChanges\n");
        result.append("--------------------\n");
        for (int i = 0; i < Math.min(uniqueL1FolderFileNames.size(), 10); i++) {
            String name = uniqueL1FolderFileNames.get(i);
            result.append(name).append("\t:\t").append(changeCount.get(name)).append("\n");
        }
        System.out.println(result);
    }

    private static List<String> readPaths() throws IOException {
        List<String> paths = new ArrayList<>();
        // file contains output of
        // `git log --since="1 month ago" --name-only --pretty="format:" | grep . > log.txt` on repository
        File log = new File("log.txt");
        try (BufferedReader reader = new BufferedReader(new FileReader(log))) {
            String path;
            while ((path = reader.readLine()) != null) {
                paths.add(path);
            }
        }
        return paths;
    }

    private static boolean isDirectory(String path) {
        return !path.matches(FILE_REGEX);
    }

    private static final String FILE_REGEX = ".+\\..+";
}