Method twoSum

src/com/blankj/easy/_0001/Solution.java:26–37

(int[] nums, int target)

//    }

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

    public static void main(String[] args) {
        Solution solution = new Solution();