1 class Solution {
 2     public void moveZeroes(int[] nums) {
 3         int temp;
 4         int idx = 0;
 5         for (int i = 0; i < nums.length; i++) {
 6             if (nums[i] != 0) {
 7                 temp = nums[idx];
 8                 nums[idx] = nums[i];
 9                 nums[i] = temp; 
10                 idx++;
11             }
12         }
13     }
14 }