How can I remove duplicate elements from a given array in java without using collections

Question

I have an array elements like this:

int arr[] = {1,1,2,2,3,3,4,4};

I want to remove the duplicate elements from. Searched on the internet

Answer 1

    int flag = 0, k = 0;
    for (int i = 0; i < arr.length; i++) {
        for (int j = 0; j < arrAns.length; j++) {
            if (arr[i] == arrAns[j]) {
                flag = 0;
                break;
            }
            flag=1;
        }
        if (flag == 1) {
            arrAns[k] = arr[i];
            k++;
        }
        flag = 0;
    }