remove duplicates array

package duplicatenumbers;

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        int[] intArray = {1, 1, 2, 3, 4, 4, 4, 5, 5, 5, 8, 8, 8};
        System.out.println(Arrays.toString(removeDuplicates(intArray)));
    }

    public static int[] removeDuplicates(int[] arr) {
        int b = 0;
        for (int i = 1; i < arr.length; i++) {

            if (arr[b] != arr[i]) {
                arr[++b] = arr[i];
            }
        }
        int[] whitelist = new int[b + 1];

        for (int i = 0; i <= b; i++) {
            whitelist[i] = arr[i];
        }
        return whitelist;
    }
}