Expand a random range from 1-5 to 1-7

Randoms.java

import java.util.Random;

public class Randoms {

    final static Random rand = new Random();

    final static int TOTAL = 1000;

    public static void main(String[] args) {

        printProbabilityRand5();

        printProbabilityRand7();
    }

    public static int rand5() {
        return rand.nextInt(5) + 1;
    }

    private static int rand7() {
        int j = 0;

        for (int i = 1; i < 8; i++) {
            j += rand5() * i;
        }
        return j % 7 + 1;
    }

    private static void printProbabilityRand5() {
        int zero = 0;
        int one = 0;
        int two = 0;
        int three = 0;
        int four = 0;
        int five = 0;

        for (int i = 0; i < TOTAL; i++) {
            int random = rand5();

            switch (random) {
            case 0:
                zero++;
                break;
            case 1:
                one++;
                break;
            case 2:
                two++;
                break;
            case 3:
                three++;
                break;
            case 4:
                four++;
                break;
            case 5:
                five++;
                break;
            }
        }

        System.out.println("zero : " + (double) zero / TOTAL + " - one : "
                + (double) one / TOTAL + " - two : " + (double) two / TOTAL
                + " - three : " + (double) three / TOTAL + " - four : "
                + (double) four / TOTAL + " - five : " + (double) five / TOTAL);
    }

    private static void printProbabilityRand7() {
        int zero = 0;
        int one = 0;
        int two = 0;
        int three = 0;
        int four = 0;
        int five = 0;
        int six = 0;
        int seven = 0;

        for (int i = 0; i < TOTAL; i++) {
            int random = rand7();

            switch (random) {
            case 0:
                zero++;
                break;
            case 1:
                one++;
                break;
            case 2:
                two++;
                break;
            case 3:
                three++;
                break;
            case 4:
                four++;
                break;
            case 5:
                five++;
                break;
            case 6:
                six++;
                break;
            case 7:
                seven++;
                break;
            }
        }

        System.out.println("zero : " + (double) zero / TOTAL + " - one : "
                + (double) one / TOTAL + " - two : " + (double) two / TOTAL
                + " - three : " + (double) three / TOTAL + " - four : "
                + (double) four / TOTAL + " - five : " + (double) five / TOTAL
                + " + six : " + (double) six / TOTAL + " + seven : "
                + (double) seven / TOTAL);

    }

}