This is my java code so far for a game of blackjack. Need help adding this to my code :

Make your program determine uniqueness in cards while drawing it. That means, that you cannot draw a card again.

package project;

import java.util.Random;

import java.util.Scanner;

public class blackjack {

static void displayInstuction() { //to display instruction

System.out.println("Instructions:"+

" First, the dealer and player each start with two cards drawn."+

" The goal of the game is to get as close to 21 card points as possible."+

" Having a card total of 21 points results in a win (unless the dealer also has a total of 21 points, in which case, it is a tie)."+

" If anyone goes over 21 points, they automatically lose."

+ " If both the dealer and player get over 21 card points, it is a tie. Otherwise, whoever is closest to 21 is deemed winner.");

}

static int drawCard() { //to draw Card

Random rand=new Random();

return rand.nextInt(13)+1;

}

static String determineWinner(int userScore,int dealerScore) //to determine who wins

{

if(userScore==21 && dealerScore==21||userScore>21 && dealerScore>21) //if its a tie

return "Tie";

else if(userScore<=21&&userScore>dealerScore||dealerScore>21) //if user wins

return "user";

else if(dealerScore<=21&&dealerScore>userScore||userScore>21) //if dealer wins

return "dealer";

return "";

}

public static void main(String[] args)

{

displayInstuction(); //displaying instruction

Scanner input=new Scanner(System.in);

String n="y"; //for user input

int userCard,dealerCard; //to store user card number and dealer card number

int userScore=0,dealerScore=0; //to store user and dealer score

//Drawing two cards for first time

userCard=drawCard();

dealerCard=drawCard();

userScore+=userCard;

dealerScore+=dealerCard;

System.out.println(" Card Drawn User got: "+userCard+

" Dealer got: "+dealerCard);

System.out.println(" User Score: "+userScore+" Dealer Score: "+dealerScore);

System.out.println(" Want to draw another Card: y or n");

n=input.next();

while(n.equalsIgnoreCase("y")) //user chance to draw card

{

userCard=drawCard();

userScore+=userCard;

System.out.println(" Card Drawn User got: "+userCard+

" Dealer got: "+dealerCard);

System.out.println(" User Score: "+userScore+" Dealer Score: "+dealerScore);

System.out.println(" Want to draw another Card: y or n");

n=input.next();

}

while(!(dealerScore>=17)) //dealer chance to draw card

{

dealerCard=drawCard();

dealerScore+=dealerCard;

System.out.println(" Card Drawn User got: "+userCard+

" Dealer got: "+dealerCard);

System.out.println(" User Score: "+userScore+" Dealer Score: "+dealerScore);

}

int m=0;

while(true) //for ace

{

System.out.println("Pick Ace Value 1 or 11 : ");

m=input.nextInt();

if(m==1||m==11)

break;

else

System.out.println("Please pick only 1 or 11...");

}

userScore+=m;

//print results

System.out.println(" User Score: "+userScore+" Dealer Score: "+dealerScore);

if(determineWinner(userScore,dealerScore).equalsIgnoreCase("user"))

System.out.println("User Wins");

else if(determineWinner(userScore,dealerScore).equalsIgnoreCase("dealer"))

System.out.println("Dealer Wins");

else

System.out.println("Its a tie");

}

}