public class MyRandom {

	public static void main(String[] args) {
		//Divide the interval [0, 1) into n subintervals.
		final int n = 20;

		int[] a = new int[n];	//n zeroes.
		//Could also say int a[] = new int[n];

		for (int i = 0; i < 1000; ++i) {
			final double r = Math.random();
			++a[(int)(r * n)];
		}

		for (int i = 0; i < a.length; ++i) {
			System.out.println(a[i]);
		}
	}
}