Question

Hello,

can you please show me how to do this program with COMPLETE INPUT VALIDATION so the computer tells the user to enter ints only if the user enters in floating point numbers or other characters?

Write a method called evenNumbers that accepts a Scanner reading input from a file containing a series of integers, and report various statistics about the integers to the console. Report the total number of numbers, the sum of the numbers, the count of even numbers and the percent of even numbers. For example, if the input file contains the following text:

5 7 2 8 9 10 12 98 7 14 20 22

:

Then the method should produce the following console output:

12 numbers, sum = 214, 8 evens(66.67%)

PLEASE TEST THE PROGRAM TO SEE IF IT WORKS

Answer 1

If you have any doubts, please give me comment...

Otherthan any integers will be skipped...

import java.io.*;

import java.util.*;

class EvenNumbers {

public static void main(String[] args) {

try {

Scanner in = new Scanner(new File("in.txt"));

evenNumbers(in);

} catch (FileNotFoundException e) {

System.out.println("File not found(in.txt)");

}

}

public static void evenNumbers(Scanner in) {

String temp;

int n = 0, num, sum = 0, evens = 0;

while (in.hasNext()) {

if (in.hasNextInt()) {

num = in.nextInt();

sum += num;

if (num % 2 == 0)

evens++;

n++;

} else {

temp = in.next();

}

}

double even_perc = ((double) evens / n) * 100;

System.out.printf("%d numbers, sum = %d, %d(%.2f)%%) ", n, sum, evens, even_perc);

}

}