DiceProbability.java

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.Scanner;

public class DiceProbability {
    private static Random random = new Random();

    private static int roll(int sides) {
        int first = random.nextInt(sides) + 1;
        int second = random.nextInt(sides) + 1;
        return first + second;
    }

    public static void main(String[] args) {
        int rolls1 = 0;
        int rolls2 = 0;
        int rolls3 = 0;
        int rolls4 = 0;
        int rolls5 = 0;
        int rolls6 = 0;
        int rolls7 = 0;
        int rolls8 = 0;
        int rolls9 = 0;
        int rolls10 = 0;
        int rolls11 = 0;
        int rolls12 = 0;
        int rolls13 = 0;
        int rolls14 = 0;
        int rolls15 = 0;
        int rolls16 = 0;
        int rolls17 = 0;
        int rolls18 = 0;
        int rolls19 = 0;
        int rolls20 = 0;
        int rolls21 = 0;
        int rolls22 = 0;

        Scanner scanner = new Scanner(System.in);

        System.out.print("Times to roll: ");
        int times = scanner.nextInt();

        for (int i = 0; i < times; i++) {
            int roll = roll(11);
            switch (roll) {
                case 1:
                    rolls1++;
                    break;
                case 2:
                    rolls2++;
                    break;
                case 3:
                    rolls3++;
                    break;
                case 4:
                    rolls4++;
                    break;
                case 5:
                    rolls5++;
                    break;
                case 6:
                    rolls6++;
                    break;
                case 7:
                    rolls7++;
                    break;
                case 8:
                    rolls8++;
                    break;
                case 9:
                    rolls9++;
                    break;
                case 10:
                    rolls10++;
                    break;
                case 11:
                    rolls11++;
                    break;
                case 12:
                    rolls12++;
                    break;
                case 13:
                    rolls13++;
                    break;
                case 14:
                    rolls14++;
                    break;
                case 15:
                    rolls15++;
                    break;
                case 16:
                    rolls16++;
                    break;
                case 17:
                    rolls17++;
                    break;
                case 18:
                    rolls18++;
                    break;
                case 19:
                    rolls19++;
                    break;
                case 20:
                    rolls20++;
                    break;
                case 21:
                    rolls21++;
                    break;
                case 22:
                    rolls22++;
                    break;
            }
        }

        System.out.println("Sum of Dice  Probability");
        System.out.println(" 1s:         " + ((rolls1 / (double) times) * 100.0));
        System.out.println(" 2s:         " + ((rolls2 / (double) times) * 100.0));
        System.out.println(" 3s:         " + ((rolls3 / (double) times) * 100.0));
        System.out.println(" 4s:         " + ((rolls4 / (double) times) * 100.0));
        System.out.println(" 5s:         " + ((rolls5 / (double) times) * 100.0));
        System.out.println(" 6s:         " + ((rolls6 / (double) times) * 100.0));
        System.out.println(" 7s:         " + ((rolls7 / (double) times) * 100.0));
        System.out.println(" 8s:         " + ((rolls8 / (double) times) * 100.0));
        System.out.println(" 9s:         " + ((rolls9 / (double) times) * 100.0));
        System.out.println("10s:         " + ((rolls10 / (double) times) * 100.0));
        System.out.println("11s:         " + ((rolls11 / (double) times) * 100.0));
        System.out.println("12s:         " + ((rolls12 / (double) times) * 100.0));
        System.out.println("13s:         " + ((rolls13 / (double) times) * 100.0));
        System.out.println("14s:         " + ((rolls14 / (double) times) * 100.0));
        System.out.println("15s:         " + ((rolls15 / (double) times) * 100.0));
        System.out.println("16s:         " + ((rolls16 / (double) times) * 100.0));
        System.out.println("17s:         " + ((rolls17 / (double) times) * 100.0));
        System.out.println("18s:         " + ((rolls18 / (double) times) * 100.0));
        System.out.println("19s:         " + ((rolls19 / (double) times) * 100.0));
        System.out.println("20s:         " + ((rolls20 / (double) times) * 100.0));
        System.out.println("21s:         " + ((rolls21 / (double) times) * 100.0));
        System.out.println("22s:         " + ((rolls22 / (double) times) * 100.0));
    }
}