26. Remove Duplicates from Sorted Array

public class Solution {
    public int removeDuplicates(int[] nums) {
        int size=nums.length;
        int last=0;
        boolean isHead=true;
        int lastIndex=0;
        for(int i=0;i<size;i++)
        {
            int temp=nums[i];
            if(isHead==true)
            {
                isHead=false;
                lastIndex++;
            }
            else
            {
                if(last!=nums[i])
                {
                    if(lastIndex!=i) 
                        nums[lastIndex]=nums[i];
                    lastIndex++;
                }
            }
            last=temp;
        }
        return lastIndex;
    }
}