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) {
        for(int i = 0; i < nums.length; i++){
            if(nums[i] == 0 && i != nums.length-1){
                for(int n = i+1; n<nums.length; n++){
                    if(nums[n] != 0) {
                        helper(nums,i,n);
                        break;
                    }
                }
            }
        }
    }
    private void helper (int [] nums, int i, int n){
        int temp = nums[i];
        nums[i] = nums[n];
        nums[n] = temp;
    }
}