import java.io.*;
import java.util.*;

public class BytePe3 {
    ArrayList<Integer> numbers = new ArrayList<Integer>();
    int part1 = 0;
    int counter = 0;
    int sum = 0;
    int numberOfFiles = 0;


    public static void main(String[] args) {
        BytePe3 p3 = new BytePe3();

        for(int n = 1; n <= 8; n++) {
            String xd = "integer"+n+".dat";
            File rawr = new File(xd);
            BytePe3.ReadInts i1 = p3.new ReadInts(rawr);
        }


    }

    class ReadInts implements Runnable {

        File abc;

        public ReadInts(File _fileName) {
            abc =_fileName;
        }

        public void run() {
            try {
                if(abc.exists() != true) {
                    System.out.println("File doesn't exist!");
                } else {
                    FileInputStream fis = new FileInputStream(abc);
                    DataInputStream dis = new DataInputStream(fis);
                    while(dis.available() > 0) {
                        part1 = dis.readInt();
                        numbers.add(part1);
                        sum += part1;
                        counter++;
                    }

                    @SuppressWarnings("unused")
                    int totalSize = 0;

                    for(int x = 0; x < numberOfFiles; x++) {
                        totalSize = numbers.size();
                    }

                    dis.close();
                    System.out.println("Filename= "+abc+"    Count = "+counter+"  sum = "+sum+"     In List = "+numbers.size());
                    counter = 0;
                    sum = 0;
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }

}