All Indices Of Element In Array

public class AllIndicesOfElementInArray {
    public static void main(String[] args) {

        int[] arr = new int[]{2, 3, 3, 4, 3};
        int element = 3;
        int[] ans = allIndices(arr, 3, 0, 0);

        for (int x : ans) {
            System.out.println(x);
        }
    }

    private static int[] allIndices(int[] arr, int ele, int idx, int fsf) {
        if (idx == arr.length)
            return new int[fsf];

        if (arr[idx] == ele)
            fsf += 1;

        int[] faith = allIndices(arr, ele, idx + 1, fsf);

        if (arr[idx] == ele) {
            faith[fsf - 1] = idx;
        }

        return faith;
    }
}