import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) throws IOException {
       new Main().printBytesAndNames();
    }

    private void printBytesAndNames() throws IOException {
        byte[] data = new byte[1000];
        Map<Integer, String> sizeAndName = new HashMap<>();
        for(Path p : listFiles()) {
            new RandomAccessFile(p.toFile(), "r").readFully(data);
            int sum = 0;
            for(byte b : data) {
                sum += b;
            }

            sizeAndName.put(sum, p.getFileName().toString());
        }

        List<Integer> intList = new ArrayList<>(sizeAndName.keySet());
        Collections.sort(intList);
        for(int i : intList) {
            System.out.println(i + ", " + sizeAndName.get(i));
        }
    }

     List<Path> listFiles() throws IOException {
        return Files.list(Paths.get("./src/images"))
                .filter(Files::isRegularFile)
                .collect(Collectors.toList());
    }
}