statistics.java

public class Statistics {

    private int count;
    private int sum;
    private int evens;
    private int odds;

    public Statistics() {

    }

    public void addNumber(int number) {
        if (number % 2 == 0) {
            this.evens = number + this.evens;
        } else {
            this.odds = number + this.odds;
        }

        number = this.sum + number;
        this.sum = number;
        this.count++;
    }

    public int sum() {

        return this.sum;
    }

    public int even() {
        return this.evens;

        // write code here
    }

    public int odd() {

        return this.odds;
    }

    public int getCount() {
        return this.count++;  // write code here
    }

    public double average() {
        if (this.count == 0) {
            return 0;
        } else {
            return (double) this.sum / this.count;
        }

    }
}



import java.util.Scanner;

public class MainProgram {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Statistics statistics = new Statistics();
        {
            System.out.println("Enter numbers: ");
            while (true) {

                int input = Integer.valueOf(scanner.nextLine());
                if (input == -1) {
                    break;
                }
                statistics.addNumber(input);


            }

            System.out.println("Sum: " + statistics.sum());
            System.out.println("Sum of even numbers: " + statistics.even());
            System.out.println("Sum of odd numbers: " + statistics.odd());
            //  System.out.println("Sum of odd numbers: " + odd);

        }
    }
}