Сдвиг 2-й способ

import java.util.Scanner;

public class Main {

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

        int n;
        n = in.nextInt();
        int[] a = new int[n];
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }

        int r;
        r = in.nextInt();

        int[] tempArray = new int[r];
        System.arraycopy(a, 0, tempArray, 0, r);


        for (int i = 0; i < n-r; i++){
            a[i] = a[i+r];
        }

        System.arraycopy(tempArray, 0, a, n-r, r);
        for (int i = 0; i < n; i++) {
            System.out.print(a[i] + " ");
        }

    }
}