How to find length of all integers while giving as input one by one

import java.util.HashMap;
import java.util.Iterator;
import java.util.Scanner;
import java.util.Set;

public class LengthOfIntegersDuringInput {

	public static void main(String args[]) {

		HashMap<Integer,Integer> DigitsMap= new HashMap<Integer,Integer>();
		Scanner inpInt=new Scanner(System.in);
		System.out.println("OUTPUT:");
		System.out.println("Enter a few integers::At the end enter 9999 to stop entering");
		while (true) {
			int num=inpInt.nextInt();
			if (num!=9999)
				DigitsMap.put(num,Integer.toString(num).length());
			else
				break;
		}
		inpInt.close();

		// Store all the keys of the HashMap in the Set collection.
		Set<Integer> allKeys=DigitsMap.keySet();
		Iterator<Integer> keyIt=allKeys.iterator();

		//Traverse through the keyIt iterator and print the values respectively for each key.
		System.out.println("The list of integers along with number of digits in each integer");
		System.out.println("Integer			NumOfDigits");
		while (keyIt.hasNext()) {
			int num=keyIt.next();
			System.out.println(num+"				"+DigitsMap.get(num));
		}
	}
}