[RESOLVED] Ok I need help

[ComputerJy]

Keep your money...it was fun

import java.io.*;

public abstract class App {
  public static void main(String[] args) {
    int ar[] = new int[50];
    ReadFile("C:\\Temp.txt", ar);
    sort(ar);
    System.out.println("Minimum= " + ar[0]);
    System.out.println("Maximum=" + ar[ar.length - 1]);
    System.out.println("Mean= " + mean(ar));
    System.out.println("Mode= " + modal(ar));
    System.out.println("Median= " + median(ar));
    System.out.println("Std Dev= " + stdDev(ar));
  }

  public static double mean(int ar[]) {
    int sum = 0;
    for (int i = 0; i < ar.length; i++) {
      sum += ar[i];
    }
    return (sum / ar.length);
  }

  public static int modal(int a[]) {
    int n;
    int freq = 0;
    int Mfreq = 0;
    int Mn = a[0];
    for (int i = 0; i < a.length; i++) {
      n = a[i];
      for (int j = 0; j < a.length; j++) {
        if (a[j] == n) {
          freq++;
        }
      }
      if (freq > Mfreq) {
        Mn = n;
      }
    }
    return Mn;
  }

  public static int median(int a[]) {
    if (a.length % 2 == 0) {
      int x = a[a.length / 2];
      int y = a[ (a.length + 2) / 2];
      return (x + y) / 2;
    }
    else {
      return a[ (a.length + 1) / 2];
    }
  }

  public static double stdDev(int a[]) {
    int s2 = 0;
    int s = 0;
    for (int i = 0; i < a.length; i++) {
      s2 += (a[i] * a[i]);
      s += a[i];
    }
    return Math.sqrt( (s2 - (s * 2) / a.length) / (a.length - 1));
  }

  public static void sort(int a[]) {
    int tmp;
    for (int i = 0; i < a.length; i++) {
      for (int j = 0; j < a.length; j++) {
        if (a[j] > a[j + 1]) {
          tmp = a[j];
          a[j] = a[j + 1];
          a[j + 1] = tmp;
        }
      }
    }
  }

  public static int ReadFile(String filename, int ar[]) {
    File infile = new File(filename);
    int value, n = 0;
    try {
      BufferedReader reader = new BufferedReader(new FileReader(infile));
      String line = null;

      while ( (line = reader.readLine()) != null) {
        value = Integer.parseInt(line);
        ar[n++] = value;
      }
      return n;
    }
    catch (IOException e) {
      System.err.println("Problem reading input file!");
    }
    return n;
  }
}