27 Remove Elements

public class Solution {
    public int removeElement(int[] nums, int val) {
        if (nums == null || nums.length == 0) {
            return 0;
        }
        int size = 0;
        for (int i = 0; i < nums.length; i++) {
            if (nums[i] != val) {
                nums[size] = nums[i];
                size++;
            }
        }
        return size;
    }
}