JAVA PROGRAM
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.InputMismatchException;
import java.util.Scanner;
public class FileTotalAndAverage {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String fileName;
do {
System.out.print("Please enter the file name: ");
fileName = scanner.nextLine();
try {
double[] numbers = readNumbersFromFile(fileName);
if (numbers != null) {
double total = calculateTotal(numbers);
double average = calculateAverage(numbers);
System.out.printf("Total: %.3f\n", total);
System.out.printf("Average: %.3f\n", average);
break; // Exit the loop if successful
}
} catch (IOException e) {
System.out.println("File '" + fileName + "' does not exist.");
} catch (InputMismatchException e) {
System.out.println("Invalid data in the file. Please make sure the file contains only numeric values.");
}
} while (true);
scanner.close();
}
private static double[] readNumbersFromFile(String fileName) throws IOException {
BufferedReader reader = new BufferedReader(new FileReader(fileName));
String line;
double[] numbers = null;
try {
String[] tokens = reader.readLine().split("\\s+");
numbers = new double[tokens.length];
for (int i = 0; i < tokens.length; i++) {
numbers[i] = Double.parseDouble(tokens[i]);
}
} finally {
reader.close();
}
return numbers;
}
private static double calculateTotal(double[] numbers) {
double total = 0;
for (double num : numbers) {
total += num;
}
return total;
}
private static double calculateAverage(double[] numbers) {
double total = calculateTotal(numbers);
return total / numbers.length;
}
}
Test Case 1
double_input1.txtENTER
Total: -5,748.583\n
Average: -57.486\n
Test Case 2
double_input2.txtENTER
Total: 112,546.485\n
Average: 56.273\n
Test Case 3
double_input3.txtENTER
File 'double_input3.txt' does not exist.\n
Please enter the file name again: \n
double_input1.txtENTER
Total: -5,748.583\n
Average: -57.486\n
Step by step
Solved in 5 steps with 8 images
