arrays

public class Trial1 {

    public static void main(String[] args) {
        int arr1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
        int arr2[] = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19};
        int arr3[] = new int[arr1.length + arr2.length];

        Scanner scan = new Scanner(System.in);
        int k = scan.nextInt();
        for(int i = 0; i < arr1.length; i++){
            if (i < k){
                arr3[i] = arr1[i];
            }
            else if (i == k){
                for (int j = 0; j < arr2.length; j++){
                    arr3[j + i] = arr2[j];
                }
            }
            else {
                arr3[arr2.length + i] = arr1[i];
            }
        }
        for (int i = 0; i<arr3.length; i++){
            System.out.print(arr3[i] + " ");
        }
    }

}