283. Move Zeroes （将数组中值为0的元素移到末尾）

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.

public class Solution {    public void moveZeroes(int[] nums) {        int i=0,j=0;    for(int num:nums){    if(num==0)    i++;    else    nums[j++] = num;    }    for(int k=nums.length-1;k>nums.length-1-i;k--)    nums[k]=0;    }}