Remove Duplicates

描述
Given a sorted array, remove the duplicates in place such that each element appear only once
and return the new length.
Do not allocate extra space for another array, you must do this in place with constant memory.
For example, Given input array A = [1,1,2],
Your function should return length = 2, and A is now [1,2].

代码

package array;

public class RemoveDuplicates {
    public static void main(String[] args) throws Exception {
        int[] nums = {1,1,2,3,3,4};
        int N = new RemoveDuplicates().removeDuplicates(nums);
        for (int i = 0; i < N; i++)
            System.out.print(nums[i] + " ");

    }
        public int removeDuplicates(int[] nums) {
            if (nums.length == 1) return 1;
            int size = 1;
            for (int j = 0, i = 1; i < nums.length; i++) {
                if (nums[i] != nums[i - 1]) {
                    size++;
                    j++;
                    nums[j] = nums[i];
                }
            }
            return size;
        }

}