Move Zeroes

Given an array nums, write a function to move all 0’s to the end of it while maintaining the relative order of the non-zero elements.

For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].

public class Solution {
    public void moveZeroes(int[] nums) {
        int valid = -1;
        for (int i = 0; i < nums.length; i++) {
            if (nums[i] != 0 && i != valid + 1) {
                nums[++valid] = nums[i];
            } else if (nums[i] != 0) {
                valid++;
            }
        }
        for (int i = valid + 1; i < nums.length; i++) {
            nums[i] = 0;
        }
    }
}