By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm writing a dice simulation program, however I'm having problems with the results because it just prints:. For instance, if you roll a 4 and 4, then count will increment, and the following else if will never run:.

You are creating Random object when you call the rollDice each and everytime. It is not good, make it instance variable. It is not the problem in your code. The problem is your if and else if conditions, Because if one condition is true not reach to other else if and elsethat is the flow of the ifelse if and else.

Since, you need to execute all the incrementation you need to change them to separate if conditions.

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Learn more. Dice Simulation java Ask Question. Asked 2 years, 10 months ago. Active 2 years, 10 months ago. Viewed times.

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I'm writing a dice simulation program, however I'm having problems with the results because it just prints: You rolled a You rolled double twos 0 out of rolls. You rolled double threes 0 out of rolls. You rolled double fours 0 out of rolls. You rolled double fives 0 out of rolls. You rolled double sixes 0 out of rolls. AmberA AmberA 1.

dice simulation java

Think about your if statements in the rollDiceAndTabulateWhile method, what happens when one dice equals the other the first if statement is the only one to get executed? Also make your Random object a class variable and instantiate it once, no need to keep creating a new Random object on each roll of the dice.

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Active Oldest Votes. Eric Eric 1, 13 13 silver badges 22 22 bronze badges.Greg Brannon wrote: So you have an array that can hold 6 values, 1 - 6, and a random number generator that generates random values 1 - 6. With two dice, the array will have to be scaled to hold the values 2 - 12 11 totaland your random number generator will have to be modified to generate values from 2 - Modifying the code you've already written should be relatively easy.

Lucas Martin wrote: I thought about that, wouldn't that throw off the results of rolling 2 die with a outcome and adding the values? Matthew Brown wrote: Lucas Martin wrote: I thought about that, wouldn't that throw off the results of rolling 2 die with a outcome and adding the values? Forum: Beginning Java.

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Dice Rolling Simulation. Lucas Martin. I have coded a dice rolling simulation to roll a single die 36, times, store the data in the array and display how many times the face value landed. My question is what do I need to do to change this to simulate rolling 2 die to display the output of face value, so adding the face value of the 2 randomly rolled die and incrementing face value. Greg Brannon.

So you have an array that can hold 6 values, 1 - 6, and a random number generator that generates random values 1 - 6. Always learning Java, currently using Eclipse on Fedora. Linux user : I thought about that, wouldn't that throw off the results of rolling 2 die with a outcome and adding the values?

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I guess I am failing at the logic here. Matthew Brown. Yes, it would. You need to extend arraybut then generate the index by adding together two random numbers from Well I thought I knew what I was doing and have spent some timeon this but apparently not. So now I am getting dice1 has not been initialized and I do not think I am summing up the two random 1,6 numbers into the total and adding them to the array correctly, any final touch ups are appreciated, thanks.

Sorry, I didn't think through the subtleties. I'd have gotten it wrong. Exactly, the 7's are much more likely to add up from the 2 die sums and it shows this.

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Tiny ad:. Boost this thread! Simulation of Rolling 2 Dice Dice Program Desparate Help!!! Can someone help me out with this code.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews.

It only takes a minute to sign up. This is my first time putting a code together for Java based on my own so i was hoping if you someone would be kind enough to review and provide feedback or constructive criticism on this code.

Similarly, diceValue is not clear. It contains the counts for each double occurence, so perhaps, doubleCounts - note the plural for an array indicating that it contains multiple values. We are working with 6 sided dice so we only need 6 entries in the array to store the double counts not 7 - it is more standard to adjust the index when outputting e. We can easily store the number of sides in a variable constant to make consistency easier - a named value instead of a literal 6 in multiple places - and even allow us to use this for dice with other numbers of sides if we desired.

We can put the 'roll' functionality into a function so that to reduce duplication and allow us to change the implementation if desired say for testing. If have sized the array to the number of elements then we should loop from 0 not 1 and single character variable names, even for loops, are generally frowned upon.

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Dice simulation and counting pairs Ask Question. Asked 3 years, 10 months ago. Active 3 years, 10 months ago. Viewed 4k times. The goal is to roll 2 dice and 10k times. The code runs fine but maybe I am overlooking some logical error or a better way to do this. Java n00b Java n00b 61 1 1 silver badge 4 4 bronze badges.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Here's my code thus far: I'm trying to use a while loop for my assignment, and i need to use Math.

As you can see, its rolling times, but its only saving the results of 1 roll, notHow do I fix this? Inside while loop, you assigned appearance time of each roll with value of dice.

dice simulation java

Also, each time your call Math. On each iteration of your while loop, you are reassigning the value of count1scount2sand the others. Instead what you should do is you should "roll the dice" and then see what value it is, and increment the proper variable. And as a fun sidenote, using Java 8 there is a significantly easier, and more cool way to do this. Learn more. Dice simulation in java Ask Question. Asked 2 years, 8 months ago. Active 2 years, 8 months ago.

Viewed 3k times. Ryan Ryan 45 1 1 silver badge 5 5 bronze badges. Active Oldest Votes. Because your logic is incorrect. In this case, use switch - case statement will be correct. Manh Le Manh Le 1, 12 12 silver badges 26 26 bronze badges.

Matthew Meacham Matthew Meacham 2 2 silver badges 9 9 bronze badges. Was driving me insane. Nice solution on Java 8. Each iteration you are replacing the previous roll's data. Don Mathew Don Mathew 1 1 gold badge 3 3 silver badges 7 7 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Featured on Meta.

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Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. I've now added a GUI to that program. Here it is:. Your program should just create a Dicecreate a DicePanel with that, and stick it in a JFrame and show it. Then play around with layouts to get something you like. Sign up to join this community. The best answers are voted up and rise to the top.

Home Questions Tags Users Unanswered. Asked 4 years, 6 months ago. Active 4 years, 6 months ago. Viewed 6k times. WHITE ; g. Active Oldest Votes. This is all very overwrought.

I think all you really need is a panel with a button and a label. Click the button, and display the results in the label.

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Related to the above, rather than overriding paintyou should be using a layout and adding subcomponents. MattPutnam MattPutnam 2 2 silver badges 2 2 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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dice simulation java

The Overflow Blog. Featured on Meta. Feedback on Q2 Community Roadmap. Linked 5. Related 7. Hot Network Questions.Dice, dice, lets play nice! Ready to roll for that winning number? You might as well test it out yourself or create you own dice simulation in java! Basically a simple simulation based off an analysis of random number in occuring trials or events. If you ever wondered how random dice games worked now is your lucky day.

Below I created a small Java application that can mimic dice rolling simulation. It will also show you the results and you may modify the code to your own fitting. Be sure to give me credit if you do use it please. Giving credit is a good practice, especially if it's more than ten lines of code. In this program, the user can create objects of class dice, and specify their names.

I was going to add the numbers of side, but you can edit the variables so that you can roll die of different numbers! Below will be the code and a quick explanation followed by some screenshots. Here I ran two simulations to show how the performance is with many trials in the program. As you can see in this simulation we were unable to get a five streak roll of 7.

However, out of the rolls, we got 16 sevens and the average to get a 7 was 5. For the second simulation, we increase the number of rolls! As you can see in this simulation we were able to get a five streak roll of 7, 13 times. However, out of therolls, we got 16, sevens and the average to get a 7 was about 5 rolls.

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That's it for this tutorial! I may or may not continue creating java tutorials, because I'm actually more of a C kind of guy despite there being not much tutorial on the language here, haha!

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I am currently working on a simple GUI application that rolls two dice. I am currently using two classes, one called "Game" and the other "DiceRoll".

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For meeting the assignment criteria, we have to use multiple classes in order for the program to work. It would be much easier just using one class Anyways, I am successfully calling my "roll " method in my "DiceRoll" class, which uses a switch statement and implements the "Graphics.

Everything looks fine, and I have no errors before I run it. However, once I press the "Roll Dice" button, I keep receiving multiple run-time errors. This is what I have so far:. I think you're making this much more complicated than is necessary. Why don't you change your public Graphics roll Graphics g method to calculate the roll and update the JLabelsomething like this You pass the JLabel through to the roll method, which calculates the roll and sets the image on that label.

Much simpler. This also means that you don't need the 2 Graphics objects either die1 and die2so you can get rid of these. You also wouldn't need the BufferedImagesbecause the loading of the image file is done by the ImageIcon class. This is my re-writing of your Game constructor, that shows how to add items to JPanels using GridLayout and BorderLayout as the layout managers As you never instantiate die1 and die2and you get NullPointerException.

Learn more. Asked 7 years, 11 months ago. Active 7 years, 3 months ago. Viewed 8k times. This is what I have so far: Game Class import java. Dimension; import java. Graphics; import java. ActionEvent; import java. ActionListener; import javax.

JButton; import javax. JFrame; import javax. JLabel; import javax. JMenu; import javax. JMenuBar; import javax. JMenuItem; import javax.


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