DigitCounter.java

public class DigitCounter {

	public static void main(String[] args) {
		
		int total = 0;
		for (int count = 1; count <= 1000000; count++) {
			
			int[] digits = Integer.toString(count).chars().map(c -> c -= '0').toArray();
			for (int d : digits) {
				total = total + d;
			}
		}
		
		System.out.println("total = " + total);
	}
}