283. 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].

Note:

1. You must do this in-place without making a copy of the array.
2. Minimize the total number of operations.

将所有的0移到数组的最后，不改变数组最初的顺序，不允许使用复制数组，尽量减少移动

 public void moveZeroes(int[] nums) {        if(nums == null || nums.length == 0)return;        int newIndex = 0;for (int i = 0; i < nums.length; i++) {if (nums[i] != 0) {nums[newIndex++] = nums[i];}}for (; newIndex < nums.length; newIndex++) {nums[newIndex] = 0;}   }