APCSA/U6/L4/runner_U6_L4_Activity_Two.java

import java.util.Scanner;

public class runner_U6_L4_Activity_Two {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Enter array length:");
        int len = scan.nextInt();
        int[] nums = new int[len];
        System.out.println("Enter values:");
        for (int i = 0; i < len; i++) {
            nums[i] = scan.nextInt();
        }
        System.out.println("Which method?\n1 - swap\n2 - allReverseSwap");
        int mtdNum = scan.nextInt();
        if (mtdNum == 1) {
            System.out.println("Enter two indices:");
            int pos1 = scan.nextInt();
            int pos2 = scan.nextInt();
            U6_L4_Activity_Two.swap(nums, pos1, pos2);
        } else if (mtdNum == 2) {
            U6_L4_Activity_Two.allReverseSwap(nums);
        } else {
            return;
        }
        System.out.print("Array contents: {");
        for (int i = 0; i < len - 1; i++) {
            System.out.print(nums[i] + ", ");
        }
        System.out.println(nums[len - 1] + "}");
    }
}