Poker Program Java
Introduction: How to Make a Poker Game in Java
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This instructable is for those that already some what know Java and want to create a game of poker within Java. First of all, you will need a computer with some sort of coding application or website that allows the use of Java. I recommend using DrJava or BlueJ. If you are not able to use an application like those two then I would recommend using the website repl.it. Once you have a Java application or website you are ready to start coding you poker program.
I decided it would be interesting to simulate a game of Poker. Baby steps at the moment, and eventually I'll attempt to turn it into a GUI. The code I have so far is very basic such as populating a deck, shuffling the deck, and distributing two cards to a player. $ begingroup $ Poker is notoriously difficult to use with OOP. Blackjack works better with it. Also this tutorial site has a number of exercises for Java that are around the level of Poker as well as exercises that are the building blocks of the more complex exercises. You will also learn GUIs, IO, Threads, ADTs, and Generics, which are IMHO.
Step 1: Create a Deck of Cards
The first thing that you need to do to be able to create a game of poker in Java is to create a deck of cards. To do this create two public static methods, one that determines a random suit, and the other determining a random number from two to fourteen. In your main method create an array that will hold all fifty two cards. Use an array to place all fifty two cards in the array. Before putting the card in the array use a for loop to make sure that the card isn't already in the array of fifty two cards. If the card isn't in the array already then place it in the array. Once the array is filled with all fifty two cards creating a shuffled deck you can then move onto the next step.
Step 2: Give the Player Five Random Cards From the Deck
The next step is to give the player five random cards from your shuffled deck. To give the player five random cards you need to use a for loop and use a random number from zero to fifty one using Math.random. Use the for loop and the random number to choose a random card from your shuffled deck of cards. After choosing five random cards print them to allow the player to see what cards they have. You are now ready to move on to the next step.
Step 3: Create for Loops, If Statements, and While Loops to Determine What Combination the Player Has
Poker Game Java Program
You are now ready for the third step of the process to create a game of poker in Java. The third step is to use for loops, if statements, and while loops to tell the player what combination they have. You will want to start with the royal flush. Use a for loop and two if statements to determine if the player has a royal flush or not. Using the for loop you will determine if all the cards have the same suit, and then using the two if statements you will determine if the cards are a ten, Jack, Queen, King, and an ace. After the royal flush you will use two while loops and three if statements to determine if the player has a straight flush. Next will be four of a kind, and you will use a while loop and three if statements to determine if they have four of a kind. After four of a kind is full house. You will use a single if statement to determine a full house. After a full house is the flush where you will use a while loop and an if statement. After a flush you will use a while loop and two if statements for both straights and three of a kind. You will then use a while loop and an if statement for both two pairs and two of a kind. Finally you will only need one if statement to determine if the player has just a high card. Now it is time to move onto the last and final step.
Step 4: Tell the Player What Their Combination Is
The final step is to tell the player what their combination is. To tell them their combination you will use println and System.exit() within the loops and statements within the the combination's code. The println will tell the player what their combination is, and the System.exit() will end the program.
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