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:

You must do this in-place without making a copy of the array.

Minimize the total number of operations.
不是0的元素直接放在数组前面覆盖，最后不足的长度补0即可。

public void moveZeroes(int[] nums)
{
int len=nums.length;
if(len<1)
return ;

int cnt=0;
for(int i=0;i<len;i++)
if(nums[i]!=0)
nums[cnt++]=nums[i];

for(int i=cnt;i<len;i++)
nums[cnt++]=0;

}