How often would you have a basic-type for a shadow land?

package shadowlands;

import java.util.Arrays.*;
import java.util.Random;

public class ShadowLands {

    public static void main(String[] args) {

        Deck deck=new Deck();

        //CardType 1 is a Shadow land
        //CardType 2 is a basic land (or Battle land) with the correct basic land type for the Shadow land
        //CardType 3 is another land (e.g., creature-land or pain-land)
        //CardType 4 is a non-land card
        //CardType 5 is not used

        for (int basics=1; basics<=20; basics++){

            deck.SetDeck(4,basics,21-basics,35,0);
            double Probability;

            System.out.println("=================================================");
            System.out.println("We now consider a deck with "+basics+" basic-type lands");
            System.out.println("=================================================");

            //The first output line give the percentage probability that a shadow land would enter the battlefield untapped on turn 1.
            //The second output line gives the percentage probability that a shadow land would enter the battlefield untapped on turn 2.
            //Etc.

            for (int turn=1; turn<=7; turn++){
                Probability=ProbabilityForRandomHand(deck,7,1000000,turn);
                System.out.println(Math.round(Probability*10000)/100.0);
                }

            System.out.println();

        }

    }//end of main

    public static double ProbabilityForRandomHand(Deck deck, int StartingCards, int NumberOfIterations, int ProbabilityType){
        //ProbabilityType T: Probability that a Shadow land on turn T would enter the battlefield untapped (outcome: 0=tapped, 1=untapped)

        Deck remainingdeck=new Deck();
        double NumberOfGamesWithFavorableOutcome=0;
        for (int IterationCounter=1; IterationCounter<=NumberOfIterations; IterationCounter++){
            OpeningHand openinghand=GiveOpeningHandAfterMulls(deck, StartingCards);
            remainingdeck.SetDeck(deck.NumberOfShadowLands-openinghand.NumberOfShadowLands,deck.NumberOfBasicLands-openinghand.NumberOfBasicLands,deck.NumberOfOtherLands-openinghand.NumberOfOtherLands,deck.NumberOfNonLandCards-openinghand.NumberOfNonLandCards,deck.NotUsed-openinghand.NotUsed);
            int Outcome=SimulateGame(remainingdeck,openinghand,ProbabilityType);
            if (Outcome==1) {NumberOfGamesWithFavorableOutcome++;}
        }
        return NumberOfGamesWithFavorableOutcome/(NumberOfIterations+0.0);
    }

    static OpeningHand GiveOpeningHandAfterMulls (Deck deck, int StartingCards) {

        Deck remainingdeck=new Deck();
        OpeningHand openinghand=new OpeningHand();
        int TypeOfCardDrawn;
        boolean KeepHand=false;

        for (int OpeningHandSize=7; OpeningHandSize>=1; OpeningHandSize--){
            if (KeepHand==false){
                openinghand.SetHand(0,0,0,0,0);
                remainingdeck.SetDeck(deck.NumberOfShadowLands,deck.NumberOfBasicLands,deck.NumberOfOtherLands,deck.NumberOfNonLandCards,deck.NotUsed);
                int NumberOfLands=0;
                for (int CardsDrawn=0; CardsDrawn<OpeningHandSize; CardsDrawn++){
                    TypeOfCardDrawn=remainingdeck.DrawCard();
                    if (TypeOfCardDrawn==1) {openinghand.NumberOfShadowLands++; NumberOfLands++;}
                    if (TypeOfCardDrawn==2) {openinghand.NumberOfBasicLands++; NumberOfLands++;}
                    if (TypeOfCardDrawn==3) {openinghand.NumberOfOtherLands++; NumberOfLands++;}
                    if (TypeOfCardDrawn==4) {openinghand.NumberOfNonLandCards++;}
                    if (TypeOfCardDrawn==5) {openinghand.NotUsed++;}
                }
                KeepHand=true;
                if (OpeningHandSize>1) {
                    // We mulligan a hand if it contains 0, 1, 6, or 7 lands
                    if (NumberOfLands<=1 || NumberOfLands>=6) {KeepHand=false;}
                    //
                }
            }
        }

        return openinghand;
    }//end of GiveOpeningHandAfterMulls


    static int SimulateGame(Deck remainingdeck, OpeningHand openinghand, int ProbabilityType) {

        int TypeOfCardDrawn=0;
        int Outcome=2;
        boolean GotAShadowLandThisTurn=false;
        boolean ThisLandEnteredTapped=false;
        boolean BasicLandInHandAtStartFirstMainPhase=false;

        int ShadowLandsInHand=openinghand.NumberOfShadowLands;
        int BasicLandsInHand=openinghand.NumberOfBasicLands;
        int OtherLandsInHand=openinghand.NumberOfOtherLands;

        for (int Turn=1; Turn<=7; Turn++){

            if (Turn>1) {
                TypeOfCardDrawn=remainingdeck.DrawCard();
                if (TypeOfCardDrawn==1) {ShadowLandsInHand++;}
                if (TypeOfCardDrawn==2) {BasicLandsInHand++;}
                if (TypeOfCardDrawn==3) {OtherLandsInHand++;}
            }
            boolean LandPlayed=false;

            if (Turn==ProbabilityType && BasicLandsInHand>=1) {BasicLandInHandAtStartFirstMainPhase=true;}

            //1. If we can play an untapped Shadow land, we do so.
            if (BasicLandsInHand>=1 && ShadowLandsInHand>=1) {
                ShadowLandsInHand--;
                LandPlayed=true;
            }

            //2. Otherwise, if we can play an other land, we do so.
            if (LandPlayed==false && OtherLandsInHand>=1) {
                OtherLandsInHand--;
                LandPlayed=true;
            }

            //3.  Otherwise, if we can play a tapped Shadow land, we do so.
            if (LandPlayed==false && BasicLandsInHand==0 && ShadowLandsInHand>=1) {
                ShadowLandsInHand--;
                LandPlayed=true;
            }

            //4. Otherwise, finally, if we can play a basic land, we do so.
            if (LandPlayed==false && BasicLandsInHand>=1) {
                BasicLandsInHand--;
                LandPlayed=true;
            }

        }//end of the for-loop over the turns

        if (!BasicLandInHandAtStartFirstMainPhase) {Outcome=0;}
        if (BasicLandInHandAtStartFirstMainPhase) {Outcome=1;}

        return Outcome;

    }//end of SimulateGame

}

class OpeningHand {
    int NumberOfShadowLands;
    int NumberOfBasicLands;
    int NumberOfOtherLands;
    int NumberOfNonLandCards;
    int NotUsed;

    int NrOfCards(){
        return NumberOfShadowLands+NumberOfBasicLands+NumberOfOtherLands+NumberOfNonLandCards+NotUsed;
    }

    void SetHand (int Nr1, int Nr2, int Nr3, int Nr4, int Nr5) {
        NumberOfShadowLands=Nr1;
        NumberOfBasicLands=Nr2;
        NumberOfOtherLands=Nr3;
        NumberOfNonLandCards=Nr4;
        NotUsed=Nr5;
    }

}//end of OpeningHand

class Deck {
    int NumberOfShadowLands;
    int NumberOfBasicLands;
    int NumberOfOtherLands;
    int NumberOfNonLandCards;
    int NotUsed;

    void SetDeck (int Nr1, int Nr2, int Nr3, int Nr4, int Nr5) {
        NumberOfShadowLands=Nr1;
        NumberOfBasicLands=Nr2;
        NumberOfOtherLands=Nr3;
        NumberOfNonLandCards=Nr4;
        NotUsed=Nr5;
    }

    int NrOfCards(){
        return NumberOfShadowLands+NumberOfBasicLands+NumberOfOtherLands+NumberOfNonLandCards+NotUsed;
    }

    int DrawCard (){
        Random generator = new Random();
        int CardType=0;
        int RandomIntegerBetweenOneAndDeckSize=generator.nextInt( this.NrOfCards() )+1;
        int OneCutoff=NumberOfShadowLands;
        int TwoCutoff=OneCutoff+NumberOfBasicLands;
        int ThreeCutoff=TwoCutoff+NumberOfOtherLands;
        int FourCutoff=ThreeCutoff+NumberOfNonLandCards;
        int FiveCutoff=FourCutoff+NotUsed;

        if (RandomIntegerBetweenOneAndDeckSize<=OneCutoff) {CardType=1; this.NumberOfShadowLands--;}
        if (RandomIntegerBetweenOneAndDeckSize>OneCutoff && RandomIntegerBetweenOneAndDeckSize<=TwoCutoff) {CardType=2; this.NumberOfBasicLands--;}
        if (RandomIntegerBetweenOneAndDeckSize>TwoCutoff && RandomIntegerBetweenOneAndDeckSize<=ThreeCutoff) {CardType=3; this.NumberOfOtherLands--;}
        if (RandomIntegerBetweenOneAndDeckSize>ThreeCutoff && RandomIntegerBetweenOneAndDeckSize<=FourCutoff) {CardType=4; this.NumberOfNonLandCards--;}
        if (RandomIntegerBetweenOneAndDeckSize>FourCutoff && RandomIntegerBetweenOneAndDeckSize<=FiveCutoff) {CardType=5; this.NotUsed--;}
        return CardType;
    }

}//end of Deck