Pontoon Error

[Dave013]

I have got this code but when I run it I it should be that the it goes bust after 21. It does not do this any ideas.

import java.util.Scanner;

public class Pontoon{

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int playerScore = 0, computerScore = 0;
String newCard = "";
playerScore += dealCard();
computerScore += dealCard();
playerScore += dealCard();
computerScore += dealCard();

System.out.printf("Your score is %d would you like another card ? y/n ", playerScore);
newCard = input.nextLine();
if(newCard.equalsIgnoreCase("Y")) {
while (newCard.equalsIgnoreCase("Y")) {
playerScore += dealCard();
System.out.printf("Your score is %d would you like another card ? y/n ", playerScore);
newCard = input.nextLine();
}
}
while(computerScore < 15){
computerScore += dealCard();
}
checkWin(playerScore, computerScore);
}
public static int dealCard(){
int value = (int) (Math.random() * 13) + 1;
int score = 0;
if(value == 1) {
System.out.println("Ace!");
score = 11;
}else if (value == 13) {
System.out.println("King!");
score = 10;
}else if (value == 12) {
System.out.println("Queen!");
score = 10;
} else if (value == 11) {
System.out.println("Jack!");
score = 10;
} else {
score = value;
}

return score;
}

public static void checkWin(int Player, int Computer) {
int player = Player;
int computer = Computer;

if (player > 21) {
System.out.println("Player Bust");
} else if (computer > 21) {
System.out.println("Computer Bust");
} else {
if (player > computer) {
System.out.println("Player Wins!");
} else {
System.out.println("Computer Wins!");
}
}
}

private Pontoon() {
}
}

[Fubarable]

Use a debugger or println statements to see why your program is behaving the way it's behaving.