Two Sum

gistfile1.java

    public int[] twoSum(int[] numbers, int target)
    {
        HashMap<Integer, Integer> map = new HashMap<Integer, Integer>();
        for (int i = 0; i < numbers.length; i++)
        {
            if (map.get(target - numbers[i]) != null)
            {
                if (map.get(target - numbers[i]) <= i)
                {
                    return new int[] { map.get(target - numbers[i]) + 1, i + 1 };
                }
                else
                {
                    return new int[] { i + 1, map.get(target - numbers[i]) + 1 };
                }
            }
            map.put(numbers[i], i);
        }
        return null;
    }