Question

please put the comment each line, make sure i will have output too. write a program, Summarize (Summarize.java), containing the main() method, that first writes 10,000 random positive double type numbers, to the full accuracy of the number (15/16 decimal places), to a text file named DataValues.txt, one number per line. The program must then close that file, and reopen it for reading. Read back the values from the file and write the following information to a file named Summary.txt:

Your name;

The class name and section number;

The current date/time (i.e., the date when the Summarize program is being run—which also means that the date/time when the Instructor runs that program should be the date seen);

The total number of values in the file (which should be exactly the number you generated, but count them anyway);

The average of the values in the file (i.e., the sum, divided by the count of numbers);

The largest value in the file; and,

The smallest value in the file (these last three values being shown to 14/15 decimal places).

Please use as your random number generator a Random class object, declared and initialized as follows:

public static final Random random = new Random(-1L);

and using the method nextDouble to get the actual double values.

You may determine the presentation of the information in the output file, but the end result should be clear and easy to read (see sample below).

Please submit at least three files for this part of the homework:

Summarize.java—the program that writes and then reads the text file of values and prints summary information about those values, plus any other subsidiary Java files that your solution may need;

DataValues.txt—the file containing the numbers; and,

Summary.txt—the file containing the summary information.

Answer 1

/***************************************Summarize.java*********************/

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Date;
import java.util.Random;
import java.util.Scanner;

public class Summarize {

   public static final Random random = new Random(-1L);

   public static void main(String[] args) {

       double total = 0.0;
       double[] data = new double[10000];
       int count = 0;
       double largest = Double.MIN_VALUE;
       double smallest = Double.MAX_VALUE;
       try {
           FileWriter writer = new FileWriter("DataValues.txt");
           BufferedWriter bw = new BufferedWriter(writer);
           for (int i = 0; i < 10000; i++) {

               bw.write(random.nextDouble() + "\n");
           }

           bw.close();
       } catch (IOException e) {
           System.err.format("IOException: %s%n", e);
       }

       try {

           Scanner scan = new Scanner(new File("DataValues.txt"));
           while (scan.hasNext()) {

               data[count] = scan.nextDouble();
               count++;
           }
           scan.close();
       } catch (FileNotFoundException e) {
           System.err.println(e);
       }

       for (double d : data) {

           total += d;

           if (largest < d) {

               largest = d;
           }
           if (smallest > d) {

               smallest = d;
           }
       }

       double avg = total / count;
       try {

           DecimalFormat format = new DecimalFormat("##.000000000000000");
           FileWriter writer = new FileWriter("Summary.txt");
           BufferedWriter bw = new BufferedWriter(writer);
           bw.write("The class name and section number: ADD HERE\n");//update here
           bw.write("The current date/time: " + new Date() + "\n");
           bw.write("The total number of values in the file: " + count + "\n");
           bw.write("The average of the values in the file: " + format.format(avg) + "\n");
           bw.write("The largest value in the file: " + format.format(largest) + "\n");
           bw.write("The smallest value in the file: " + format.format(smallest) + "\n");
           bw.close();
       } catch (IOException e) {
           System.err.println(e);
       }
   }
}
/*******************output*******************/

The class name and section number: ADD HERE
The current date/time: Sun Nov 17 17:12:19 IST 2019
The total number of values in the file: 10000
The average of the values in the file: .501431425159974
The largest value in the file: .999902254781280
The smallest value in the file: .000021260344885

Please let me know if you have any doubt or modify the answer, Thanks :)