code challenge a

code_challenge_solution.java

public class Code_Challenge_Solution {
    public static void main(String[] args) {
        int[] listFirst = {1, 2, 3, 5, 7, 9, 11, 12, 13};
        int[] listSecond = {2, 4, 5, 6, 8, 10, 12};

        int i = 0;   // listFirst.length;
        int j = 0;   // listSecond.length;

        while (i < listFirst.length && j < listSecond.length) {
            if (listFirst[i] == listSecond[j]) {
                System.out.println("The List Intersect: " + listFirst[i]);
                return;
            } else if (listFirst[i] < listSecond[j]) {
                i++;
            } else {
                j++;
            }
        }
        System.out.println("testing");
    }
}

Emailed the code to another device, then uploaded it from IntelliJ from the other device. Hope it worked!