Question

In JAVA

Twenty students were asked to rate on a scale of 1 to 5 the quality of the food in the student cafeteria, with 1 being "awful" and 5 being "excellent." The 20 responses are stored in numbers.txt file. Read the responses from "numbers.txt" file, determine the frequency of each rating and output it to the text file "output.txt" The responses should be read from the file by using a Scanner. Use method nextint to input one integer at a time from the file. The program should continue to read responses until it reaches the end ot the tile. The results should be output to the text tile output.txt".Use a Formatter to create a file called "output.tx". Each integer should be wrtten using method format. Sample input and output are shown in the below table. numbers.txt 31253322332143144533Rating Frequency output.txt

Answer 1

Thanks for posting the question, we are glad to help you .Here is the complete code in Java. Below is the output i generated in my system. You may need to change the below two paths in your system

private static final String inputFilePath = "F:\\numbers.txt";
private static final String outputFilePath = "F:\\output.txt";

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

public class Ratings {

    private static final String inputFilePath = "F:\\numbers.txt";
    private static final String outputFilePath = "F:\\output.txt";
    private static java.util.Scanner console;

    public static void main(String[] args) {

        int[][] ratingCount = new int[5][1];
        try {
            console = new java.util.Scanner(new File(inputFilePath));
            while (console.hasNextLine()) {
                String line = console.nextLine();
                String[] ratings = line.split("\\s+");
                for (String rating : ratings) {
                    if (rating.trim().length() == 0)
                        continue;
                    int rate = Integer.parseInt(rating);
                    if (rate == 1)
                        ratingCount[0][0] = 1 + ratingCount[0][0];
                    else if (rate == 2)
                        ratingCount[1][0] = 1 + ratingCount[1][0];
                    else if (rate == 3)
                        ratingCount[2][0] = 1 + ratingCount[2][0];
                    else if (rate == 4)
                        ratingCount[3][0] = 1 + ratingCount[3][0];
                    else if (rate == 5)
                        ratingCount[4][0] = 1 + ratingCount[4][0];
                }
            }
            console.close();


        } catch (FileNotFoundException fne) {
        }
        writeToFile(ratingCount);
    }

    public static void writeToFile(int[][] ratingCount) {
        Formatter output = null;
        try {
            output = new Formatter(outputFilePath);
            output.format("%-10s%-10s\r\n", "Rating", "Frequency");
            for (int index = 0; index < ratingCount.length; index++) {
                output.format("%-12d%-12d\r\n", index + 1, ratingCount[index][0]);
            }
            output.flush();


        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            output.close();
        }
    }
}

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Thank you !