Java Puzzle 15 (explain the behavior of this program)

Puzzle15.java

import java.util.Arrays;
import java.util.Random;

public class Puzzle15 {

	public static void main(String[] args) {
		int[] arr = new int[10000];
		Random rnd = new Random();
		for (int i = 0; i < arr.length; i++) {
			arr[i] = rnd.nextInt(1000);
		}
		long unsortedTime = measureSumTime(arr);
		Arrays.sort(arr);
		long sortedTime = measureSumTime(arr);
		String comparison = ((unsortedTime == sortedTime) ? 
				"==" : ((unsortedTime < sortedTime) ? "<" : ">"));
		System.out.println("Unsorted Time " + comparison + " Sorted Time");
	}

	private static long measureSumTime(int[] arr) {
		long start = System.nanoTime();
		int result = 0;
		for (int i = 0; i < arr.length; i++) {
			if (arr[i] < 100) {
				result += arr[i];
			}
		}
		long time = System.nanoTime() - start;
		System.out.println("Sum: " + result + " in " + time + "ns");
		return time;
	}

}