class closestNeighb {
    public static void main(String[] args) {
        int[] myArray = {0, 5, 1209, 6, 2, 111, 112, 33};
        int[] result = findClosest(myArray);
        int difference = Math.abs(result[0]-result[1]);
        System.out.println("The smallest difference is: " + difference + " - between " + result[0] + " and " + result[1]);
    }

    private static int[] findClosest(int[] numbers) {
        int diff = Math.abs(numbers[0]-numbers[1]);
        int result[] = {numbers[0], numbers[1]}; //saves diff and saves first 2 numbers

        for (int arrIndex = 1; arrIndex < numbers.length-1; arrIndex++) {
            if ((Math.abs(numbers[arrIndex] - numbers[arrIndex+1])) < diff) { //checks next && checks if diff is smaller than saved
                result[0] = numbers[arrIndex];
                result[1] = numbers[arrIndex+1];
                diff = Math.abs(numbers[arrIndex]-numbers[arrIndex+1]);
            }
        }


        return result;
    }
}