Question

If user input negative number or letter it crashes
package largesmallaverage;

import java.util.Scanner;

public class LargeSmallAverage
{

public static void main(String[] args)
{
Scanner keyboard = new Scanner( System.in );
MyStatistics myStats = new MyStatistics();

int min;
int max;
double average;

int [] numbers;

numbers = readInput();


max = myStats.findMax(numbers);
min = myStats.findMin(numbers);
average = myStats.findMean(numbers);

System.out.