Remove duplicates from sorted array ||

Follow up for "Remove Duplicates":
What if duplicates are allowed at most twice?
For example,
Given sorted array A = [1,1,1,2,2,3],
Your function should return length = 5, and A is now [1,1,2,2,3].
Example 

public static int removeDuplicates(int[] nums) {
			if (nums == null) return -1;
			if (nums.length <= 2) return nums.length;
			int newIndex = 1;
			for (int i = 2; i < nums.length; i++) {
			if (nums[i] != nums[newIndex] || nums[i] != nums[newIndex - 1]) {
				newIndex++;
				nums[newIndex] = nums[i];
			}
		} 
			return newIndex + 1;
		}