ClassWork2018-02-15

import java.util.Random;

public class Application {
    private Random rnd;
    private int[] simpleArray;

    public Application() {
        rnd = new Random(System.currentTimeMillis());
    }

    public static void main(String[] args) {
        Application app = new Application();
        app.runTheApp();
    }

    private void runTheApp() {
        initSimpleArray();
        printAnArray();
        System.out.println("\nsimple array sum = " + getSimpleArraySum());
        System.out.println("\nhop 2 = " + Parity());
        Middle();

    }

    private void initSimpleArray() {
        simpleArray = new int[rnd.nextInt(100)];
        for (int i = 0; i < simpleArray.length; i++) {
            simpleArray[i] = rnd.nextInt(100);
        }
    }

    private int getSimpleArraySum() {
        int res = 0;
        for (int i : simpleArray) {
            res += i;
        }

        return res;

    }

    private void printAnArray() {
        for (int i : simpleArray) {
            System.out.printf("%d ", i);
        }
    }

    private int Parity() {
        int sumParity = 0;
        for (int i : simpleArray) {
            if (i%2==0)
                sumParity +=i;

        }
        return sumParity;
    }

    private void Middle() {
        int i;
        int j;
        for (i = 0, j = simpleArray.length/2 ; i < simpleArray.length; i++,j++) {
            while(j<simpleArray.length) {
                System.out.print(" " + simpleArray[j++]);

            }
            while(i<simpleArray.length/2){
                System.out.print(" " + simpleArray[i++]);
            }

        }
    }

}