Roulette

import java.util.Random;
import java.util.Scanner;

public class Roulette {

    public static void main(String arg[]) {
        Random myGen = new Random();
        Scanner kb = new Scanner(System.in);

        System.out.println("Enter a the amount of games to play:");

        int input = kb.nextInt();

        int blacks = 0;
        int reds = 0;
        int greens = 0;
        int evenStreak = 0;
        int oddStreak = 0;
        int evenMax = 0;
        int oddMax = 0;

        // -2 = NOT SET
        // -1 = evens
        //  0 = green
        //  1 = odds
        int parity = -2;

        for (int i = 0; i < input; i++) {
            int temp = myGen.nextInt(37);
            if(temp == 0){
                greens++;
                parity = 0;
                if(evenStreak > evenMax) evenMax = evenStreak;
                if(oddStreak > oddMax) oddMax = oddStreak;
                evenStreak = 0;
                oddStreak = 0;
            } else {
                if(temp % 2 == 0){ // evens
                    if(parity == -1) evenStreak++;
                    parity = -1;
                    if(temp < 11){
                        blacks++;
                    } else if(temp < 19){
                        reds++;
                    } else if(temp < 29){
                        blacks++;
                    } else {
                        reds++;
                    }
                    if(oddStreak > oddMax){
                        oddMax = oddStreak;
                        oddStreak = 0;
                    }
                } else { //odds
                    if(parity == 1) oddStreak++;
                    parity = 1;
                    if(temp < 11){
                        reds++;
                    } else if(temp < 19){
                        blacks++;
                    } else if(temp < 29){
                        reds++;
                    } else {
                        blacks++;
                    }
                    if(evenStreak > evenMax){
                        evenMax = evenStreak;
                        evenStreak = 0;
                    }
                }
            }
        }
        //print output
        System.out.println("Experimental Value :: Predicted Value");
        System.out.printf("# of Reds:  " + reds + " :: %.0f\n", 18.0/37.0 * input);
        System.out.printf("# of Blacks:  " + blacks + " :: %.0f\n", 18.0/37.0 * input);
        System.out.printf("# of Greens:  " + greens + " :: %.0f\n", 1.0/37.0 * input);
        System.out.printf("Max odd Streak:  " + oddMax + " :: %.0f\n", -10 * Math.log(input) * Math.log(18.0/37.0));
        System.out.printf("Max even Streak:  " + evenMax + " :: %.0f\n", -10 * Math.log(input) * Math.log(18.0/37.0));
    }
}