I need help. Had similar quesiton to this but this time its under \"Arrays Homew

Question

I need help. Had similar quesiton to this but this time its under "Arrays Homework". This is for JAVA ECLIPSE

Write a program that asks the user for the name of a file. The program should read all the numbers from the given file and display the total and average of all numbers in the following format (three decimal digits):

Total: nnnnn.nnn

Average: nnnnn.nnn

Class name: FileTotalAndAverage

Test Case 1

double_input1.txt

double_input2.txt

Test Case 2

double_input1.txt

double_input2.txt

Test Case 3

double_input1.txt

double_input2.txt

The code is suppose to be able to get these kind of test cases. Please help

  double_input1.txt

double_input1.txt

double_input2.txt

Explanation / Answer

ReadFileNumbersAndSum.java

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Scanner;

public class ReadFileNumbersAndSum {

public static void main(String[] args) throws FileNotFoundException {

Scanner scan = new Scanner(System.in);

System.out.println("Please enter the file name: ");

String fileName = scan.next();

File file = new File(fileName);

while(!file.exists()) {

System.out.println("File '"+fileName+"' does not exist.");

System.out.println("Please enter the file name again: ");

fileName = scan.next();

file = new File(fileName);

}

Scanner read = new Scanner(file);

int count =0;

double sum = 0;

while(read.hasNextDouble()){

sum+=read.nextDouble();

count++;

}

System.out.printf("Total: %.3f ",sum);

System.out.printf("Average: %.3f ",sum/count);

}

}

Output:

Please enter the file name:
test.txt
File 'test.txt' does not exist.
Please enter the file name again:
D: umbers.txt
Total: 297925.000
Average: 5841.667

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