import java.io.FileReader;
import java.io.IOException;

public class BruteForce
{

      public static void main(String[] args )
      {
            if (args.length < 0)
            System.out.println("No filename specified");
            else
            try
            {

                  FileReader reader = new FileReader("ad.txt");
          }
          catch (IOException ioe)
          {
                  System.err.println(" Error on  opening file ad.data\n" + ioe.toString() );
                  System.exit(1);
          }
          try
          {
                  char[] capital = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K', 'L', 'M', 'N',
                                    'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};

            char[] small =   { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
                                  'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
                  System.out.println("Leter     Frequency");
                  FileReader reader = new FileReader("ad.txt");
                  int nextChar;
                  char ch;
                  int count=0;
            for (int i = 0; i < 26; i++)
            {


      while ( (nextChar = reader.read() ) != -1 )
      {

      ch = (char) nextChar;
      if( ch== capital[i] || ch == small[i] )
      {
       count++;
                }

      }

              System.out.print("  " + capital[i]);
              System.out.println("          " + count);

             }

                  reader.close();

                  System.exit(0);
            }
            catch( IOException ioe)
            {
                  System.err.println("Input/output error");
                  System.exit(2);
            }
      }
}

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

public class BruteForce
{

    public static void main(String[] args )
    {
        char[] capital = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K', 'L', 'M', 'N',
                'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};

        char[] small =   { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
                'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };

        Scanner scan;
        try {
            scan = new Scanner(new File("BruteForce.java"));
        } catch (Exception e) {
            System.out.println("File not found");
            return;
        }
        int[] count = new int[26];
        while(scan.hasNextLine()) {
            String line = scan.nextLine();
            System.out.println("Line read: " + line);
            char[] digit = line.toCharArray();
            for(int i = 0; i < digit.length; i++) {
                for(int j = 0; j < 26; j++) {
                    if(digit[i] == capital[j] || digit[i] == small[j]) {
                        count[j]++;
                        break;
                    }
                }
            }
        }
        for (int i = 0; i < 26; i++)
        {
            System.out.print("  " + capital[i]);
            System.out.println("          " + count[i]);

        }

    }
}