InterviewQuestion.java

import java.util.ArrayList;
import java.util.List;

public class InterviewQuestion {
	public static void main(String[] args) {
		int arr[] = { 2, 2, 3, 4 };
		int num = 4;

		System.out.println("Number is: " + num + "and its count :" + countNum(arr, num));

	}

	static int countNum(int[] arr, int num) {

		List<Integer> al = new ArrayList<>(arr.length);

		for (int i : arr) {
			al.add(Integer.valueOf(i));
		}

		int i = al.indexOf(num);
		int count = 0;
		int nextIndex = 0;
		while (i < arr.length) {
			nextIndex = al.indexOf(num + 1);
			if (nextIndex != -1) {
				count++;
				num++;
			} else {
				break;
			}
			i++;
		}
		return count;
	}
}