Question

Create a class called clsTextProcessor.java. Your program should deliver the following:

1. Asks the user for a location of a text file, with (FileNotFound) exception handling:
   1. Keep asking for a valid file name and location
   2. If an invalid file is provided, display an error message.
   3. Once provided, proceed.
2. Opens the text file and finds the following:
   1. Minimum value
   2. Maximum value
   3. The average value of all number in the text
3. Prints a message displaying the values in step No. 2

Answer 1

ClsTextProcessor.java

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

public class ClsTextProcessor {
   public static void main(String[] args) {
       Scanner scan = new Scanner(System.in);
       System.out.println("Enter file name:");
       String fileName = scan.next();
       // Reading file name
       File file = new File(fileName);
       // Loop to enter valid file name and location
       while (!file.exists()) {
           System.out
                   .println("Invalid file and location. Enter valid file name:");
           fileName = scan.next();
           file = new File(fileName);
       }
       try {
           // number of values
           int count = 0;
           // max, min, sum variables initialized with 0
           int max = 0, min = 0, sum = 0;
           Scanner fileRead = new Scanner(file);
           // reading each value from file and keeping in num variable
           while (fileRead.hasNextInt()) {
               int num = fileRead.nextInt();
               if (count == 0) {
                   // file value from file assigned to min, max
                   max = min = num;
               } else {
                   if (min > num) {
                       min = num;
                   }
                   if (max < num) {
                       max = num;
                   }
               }
               // Adding each value
               sum += num;
               // count increased for each value
               count++;
           }
           // calculating average value
           double avg = sum / (double) count;
           System.out.println("Minimum value: " + min);
           System.out.println("Maximum value: " + max);
           System.out.println("The average value of all number in the text: "
                   + avg);
       } catch (FileNotFoundException e) {
           System.out.println("File is not found");
       }

   }

}

Output:

Enter file name::
D://numbers111.txt
Invalid file and location. Enter valid file name:
D://numbers.txt
Minimum value: 1
Maximum value: 10
The average value of all number in the text: 5.5

numbers.txt:

1 2 3 4 5 6 7 8 9 10