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.

1. Minimize the total number of operations.

    public void moveZeroes(int[] nums) {        int right = 0; //i是非零元素的index，j是零元素的index          for(int left = 0; left < nums.length; left++) { //left先走，走到不是0元素的时候交换，交换完了right再走            if(nums[left] != 0) {                 int temp = nums[right];                  nums[right] = nums[left];                  nums[left] = temp;                  right++;              }          }      }