sample.java

import java.util.*;

class JavaSample {
    public static void main(String [] args) {
        Random rand = new Random();
        final int N = Integer.valueOf(args[0]);
        List<Double> list = new ArrayList<Double>(N);
        for (int i = 0; i < N; i++) {
            list.add(rand.nextDouble());
        }
        long s = System.nanoTime();
        double sum = 0;
        for (double l : list) {
            sum += l;
        }
        long e = System.nanoTime();
        String time = String.valueOf((e-s)/1e9);
        System.out.println("sum:" + String.valueOf(sum));
        System.out.println("runtime: " + time);
    }
}