Removing Duplicate Values from ArrayList

Question

I have one Arraylist of String and I have added Some Duplicate Value in that. and i just wanna remove that Duplicate value So how to remove it.

Here Example I got o

Answer 1

Simple function for removing duplicates from list

private void removeDuplicates(List list)
{
    int count = list.size();

    for (int i = 0; i < count; i++) 
    {
        for (int j = i + 1; j < count; j++) 
        {
            if (list.get(i).equals(list.get(j)))
            {
                list.remove(j--);
                count--;
            }
        }
    }
}

Example:
Input: [1, 2, 2, 3, 1, 3, 3, 2, 3, 1, 2, 3, 3, 4, 4, 4, 1]
Output: [1, 2, 3, 4]