I'm dealing with a poker project and I'm finally at the final level. I need to program a straight ( for non-poker players, 5 cards where the order of their values is straight, ex 2,3,4,5,6). I think I got the logic pretty well except for the fact that I don't know what to do with the Ace. The ace has values 1 and 14 for convenience (ie, a straight could be A,2,3,4,5 and A,K,Q,J,10). I did 3 if statements and the program runs pretty well except that when I get an Ace the program crashes.

My idea was to do 3 ifs.

1. The first one uses the ace (and all numbers) as strings, put them in an array, sort them, and then allow the program to work with a,2,3,4,5 (as strings).

2. The second one was to use the ace as a string and allow the program to run with a,k,j,q,and ten. (also as strings).

3. Convert all of the other cards to ints, make an array of the ints, compute the following variables:

int a = numbers[4] - 1;

int b = numbers[3] - 1;

int c = numbers[2] - 1;

int d = numbers[1] - 1;

and then use the if statement:

else if (numbers[0].equals(d) && numbers[1].equals(c) && numbers[2].equals(b) && numbers[3].equals(a))

Could anyone give me an idea as to why the program crashes whenever I get an ace or give me an alternate solution to the problem?

Here is the full class (although it the focus should be in the addToTurnedCardsBuffer method):

import java.util.Arrays; import javax.swing.ImageIcon; import javax.swing.JFrame; public class StraightFlushLevel extends FullHouseLevel { // TRIO LEVEL: The goal is to find, on each turn, three cards with the same rank protected StraightFlushLevel(TurnsTakenCounterLabel validTurnTime, JFrame mainFrame) { super(validTurnTime, mainFrame); super.turnsTakenCounter.setDifficultyModeLabel("Straight Flush Level"); cardsToTurnUp = 5; cardsPerRow = 10; rowsPerGrid = 5; } @Override protected void makeDeck() { // In Trio level the grid consists of distinct cards, no repetitions ImageIcon cardIcon[] = this.loadCardIcons(); //back card ImageIcon backIcon = cardIcon[TotalCardsPerDeck]; int cardsToAdd[] = new int[getRowsPerGrid() * getCardsPerRow()]; for(int i = 0; i < (getRowsPerGrid() * getCardsPerRow()); i++) { cardsToAdd[i] = i; } // randomize the order of the deck this.randomizeIntArray(cardsToAdd); // make each card object for(int i = 0; i < cardsToAdd.length; i++) { // number of the card, randomized int num = cardsToAdd[i]; // make the card object and add it to the panel String rank = cardNames[num].substring(0, 1); if(rank.equals("t")) { rank = "10"; } else if (rank.equals("j")) { rank = "11"; } else if (rank.equals("q")) { rank = "12"; } else if (rank.equals("k")) { rank = "13"; } String suit = cardNames[num].substring(1, 2); this.grid.add( new Card(this, cardIcon[num], backIcon, num, rank, suit)); } } @Override protected boolean addToTurnedCardsBuffer(Card card) { // add the card to the list this.turnedCardsBuffer.add(card); if(this.turnedCardsBuffer.size() == getCardsToTurnUp()) { // We are uncovering the last card in this turn // Record the player's turn this.turnsTakenCounter.increment(); // get the other card (which was already turned up) Card otherCard1 = (Card) this.turnedCardsBuffer.get(0); Card otherCard2 = (Card) this.turnedCardsBuffer.get(1); Card otherCard3 = (Card) this.turnedCardsBuffer.get(2); Card otherCard4 = (Card) this.turnedCardsBuffer.get(3); String value1 = card.getRank(); String value2 = otherCard1.getRank(); String value3 = otherCard2.getRank(); String value4 = otherCard3.getRank(); String value5 = otherCard4.getRank(); Integer num1 = Integer.parseInt(value1); Integer num2 = Integer.parseInt(value2); Integer num3 = Integer.parseInt(value3); Integer num4 = Integer.parseInt(value4); Integer num5 = Integer.parseInt(value5); String[] cards = {value1, value2, value3, value4, value5}; Integer[] numbers = {num1, num2, num3, num4, num5}; Arrays.sort(cards); Arrays.sort(numbers); int a = numbers[4] - 1; int b = numbers[3] - 1; int c = numbers[2] - 1; int d = numbers[1] - 1; if( cards[0] == "2" && cards[1] == "3" && cards[2] == "4" && cards[3] == "5" && cards[4] == "a" ) { this.turnedCardsBuffer.clear(); } else if(cards[0] == "a" && cards[1] == "j" && cards[2] == "k" && cards[3] == "q" && cards[4] == "t") { this.turnedCardsBuffer.clear(); } else if (numbers[0].equals(d) && numbers[1].equals(c) && numbers[2].equals(b) && numbers[3].equals(a)) { this.turnedCardsBuffer.clear(); } else { // The cards do not match, so start the timer to turn them down this.turnDownTimer.start(); } } return true; } }

--- Update ---

Wow, just realized I made the mistake of naming local variable a just like the name of the card a. (int a = numbers[4] - 1. I renamed it to aa but I still get an error. Here is the new code:

import java.util.Arrays; import javax.swing.ImageIcon; import javax.swing.JFrame; public class StraightFlushLevel extends FullHouseLevel { private String ace; // TRIO LEVEL: The goal is to find, on each turn, three cards with the same rank protected StraightFlushLevel(TurnsTakenCounterLabel validTurnTime, JFrame mainFrame) { super(validTurnTime, mainFrame); super.turnsTakenCounter.setDifficultyModeLabel("Straight Flush Level"); cardsToTurnUp = 5; cardsPerRow = 10; rowsPerGrid = 5; } @Override protected void makeDeck() { // In Trio level the grid consists of distinct cards, no repetitions ImageIcon cardIcon[] = this.loadCardIcons(); //back card ImageIcon backIcon = cardIcon[TotalCardsPerDeck]; int cardsToAdd[] = new int[getRowsPerGrid() * getCardsPerRow()]; for(int i = 0; i < (getRowsPerGrid() * getCardsPerRow()); i++) { cardsToAdd[i] = i; } // randomize the order of the deck this.randomizeIntArray(cardsToAdd); // make each card object for(int i = 0; i < cardsToAdd.length; i++) { // number of the card, randomized int num = cardsToAdd[i]; // make the card object and add it to the panel String rank = cardNames[num].substring(0, 1); if(rank.equals("t")) { rank = "10"; } else if (rank.equals("j")) { rank = "11"; } else if (rank.equals("q")) { rank = "12"; } else if (rank.equals("k")) { rank = "13"; } String suit = cardNames[num].substring(1, 2); this.grid.add( new Card(this, cardIcon[num], backIcon, num, rank, suit)); } } @Override protected boolean addToTurnedCardsBuffer(Card card) { // add the card to the list this.turnedCardsBuffer.add(card); if(this.turnedCardsBuffer.size() == getCardsToTurnUp()) { // We are uncovering the last card in this turn // Record the player's turn this.turnsTakenCounter.increment(); // get the other card (which was already turned up) Card otherCard1 = (Card) this.turnedCardsBuffer.get(0); Card otherCard2 = (Card) this.turnedCardsBuffer.get(1); Card otherCard3 = (Card) this.turnedCardsBuffer.get(2); Card otherCard4 = (Card) this.turnedCardsBuffer.get(3); String value1 = card.getRank(); String value2 = otherCard1.getRank(); String value3 = otherCard2.getRank(); String value4 = otherCard3.getRank(); String value5 = otherCard4.getRank(); Integer num1 = Integer.parseInt(value1); Integer num2 = Integer.parseInt(value2); Integer num3 = Integer.parseInt(value3); Integer num4 = Integer.parseInt(value4); Integer num5 = Integer.parseInt(value5); String[] cards = {value1, value2, value3, value4, value5}; Integer[] numbers = {num1, num2, num3, num4, num5}; Arrays.sort(cards); Arrays.sort(numbers); int aa = numbers[4] - 1; int b = numbers[3] - 1; int c = numbers[2] - 1; int d = numbers[1] - 1; final String ace; if( cards[0] == "2" && cards[1] == "3" && cards[2] == "4" && cards[3] == "5" && cards[4] == "a" ) { this.turnedCardsBuffer.clear(); } else if(cards[0] == "a" && cards[1] == "j" && cards[2] == "k" && cards[3] == "q" && cards[4] == "t") { this.turnedCardsBuffer.clear(); } else if (numbers[0].equals(d) && numbers[1].equals(c) && numbers[2].equals(b) && numbers[3].equals(aa)) { this.turnedCardsBuffer.clear(); } else { // The cards do not match, so start the timer to turn them down this.turnDownTimer.start(); } } return true; } }