Question

Ask the user for a filename. In binary format, read all the integers in that file. Show the number of integers you read in, along with the maximum and minimum integer found. Language is Java.

/////////////input/////////

n1.dat

////////// output//////////

Enter a filename\n
Found 50 integers.\n
Max: 9944\n
Min: 74\n

Answer 1

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

public class BinaryNumberFileInformation {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a filename");
        File file = new File(in.nextLine());
        try {
            Scanner scanner = new Scanner(file);
            int numIntegers = 0, num;
            int small = Integer.MAX_VALUE;
            int large = Integer.MIN_VALUE;
            while (scanner.hasNextInt()) {
                num = scanner.nextInt();
                if (num > large)
                    large = num;
                if (num < small)
                    small = num;
                ++numIntegers;
            }
            System.out.println("Found " + numIntegers + " integers.");
            System.out.println("Max: " + large);
            System.out.println("Min: " + small);
            scanner.close();
        } catch (IOException e) {
            System.out.println(file.getAbsolutePath() + " does not exists!");
        }
    }
}