I have wrote this program to remove the duplicates from an unsorted Array, Please review and give me your inputs to improve it little more.

public static void main(String[] args) {

    int[] arr = {4, 3, 4, 2, 6, 1, 1, 7, 6, 8, 9, 9, 1, 1};

    // perform quick sort for o(n log n) time.
    quickSort(arr, 0, arr.length - 1);

    System.out.println(Arrays.toString(arr));
    // now remove the duplicate elements.
    arr = removeDuplicates(arr);
    System.out.println("Unique elements in Array :" + Arrays.toString(arr));
}
private static int[] removeDuplicates(int[] arr) {
    // if array length is one, return the array
    if (arr.length <= 1) {
        return arr;
    }

    // new array keep the length equal to current array.
    int[] uniqueArray = new int[arr.length];
    // keep the lastfound number to be 0th index.
    int lastFound = arr[0];
    // copy the 0th index value to new arrays 0th.
    uniqueArray[0] = arr[0];

    // keep track of number of duplicates found.
    int totalDuplicates = 0;

    // current index position to put the unique number
    int currPos = 1;
    for (int i = 0; i < arr.length; i++) {

        if (lastFound == arr[i]) {
            totalDuplicates++;
        } else {
            lastFound = arr[i];
            uniqueArray[currPos] = arr[i];
            currPos++;
        }
    }

    // at this point array wil have unique numbers along with empty
    // slots at the end in array, lets remove those.

    int newLength = arr.length - totalDuplicates;

    uniqueArray = Arrays.copyOf(uniqueArray, newLength + 1);
    return uniqueArray;
}

private static void quickSort(int[] arr, int s, int e) {

    if (s < e) {
        int pivot = findPivot(arr, s, e);
        System.out.println(pivot);
        // sort left
        quickSort(arr, s, pivot - 1);
        // sort right
        quickSort(arr, pivot + 1, e);
    }

}

private static int findPivot(int[] arr, int s, int e) {
    int p = arr[e];
    int i = s;
    for (int j = s; j < e; j++) {
        if (arr[j] <= p) {
            swap(arr, i, j);
            i = i + 1;
        }
    }
    swap(arr, e, i);
    return i;
}

private static void swap(int[] arr, int i, int j) {
    int t = arr[i];
    arr[i] = arr[j];
    arr[j] = t;
}