LeetCode 26. Remove Duplicates form Sorted Array [Easy]

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题目来源：https://leetcode.com/problems/remove-duplicates-from-sorted-array/

题目难度：Easy

解答1[Java]：

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class Solution {
    public int removeDuplicates(int[] nums) {
        if (nums.length == 0) return 0;

        int head = 0;
        int tail = 0;
        for (; tail < nums.length; tail++) {
            if (nums[head] != nums[tail]) {
                nums[++head] = nums[tail];
            }
        }

        return head + 1;
    }
}