Java lottery game

Java lottery game

Note: You'll need to know about for loops and if statements for this guessing game, so you'll need to have read all but the last of the beginner tutorials or already know all of these concepts. In this guessing game, the computer will come up with a random number between 1 and The player must then continue to guess numbers until the player guesses the correct number.

For every guess, the computer will either say "Too high" or "Too low", and then ask for another input. At the end of the game, the number is revealed along with the number of guesses it took to get the correct number.

Ready to follow along to create this guessing game? All right. First, we're going to start by creating a new class, or Java file. Call your new program GuessingGame, keeping the capitalization the same. If you're using Eclipse and I strongly urge you to! You should start out like this:. Ok, we need the computer to generate random numbers. Just add this code inside your main method so you have this:.

Don't worry much about how Random works. All you need to know for this guessing game is that the variable numberToGuess holds the integer that the player has to guess. Notice you'll get an error when you try to use Random. This is the same problem that Scanner has. All you have to do is right-click your work area, go to source, and select Organize Imports.

This will take care of the problem for you. If you want to just import manually, type in import java. Random; at the very top of the page. Now, we need to stop and figure out exactly what we need our game to do and how we're going to accomplish this goal.

It's best to do this planning BEFORE you beign coding, so let's start by listing what the guessing game needs to do, also known as the requirements of the program. This is a small list, but it does say everything we need to do for our guessing game to work.

We already took care of the first need, which was to create a random number. So, let's move on to the next requirement, keeping track of the number of guesses. To keep track of anything, you need a variable.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

java lottery game

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 am having issues writing a java program for a lottery game the program that i have written works but i cant get the sum part to work right. Learn more. Lottery Game in java Ask Question. Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed 2k times. Please check the code that is included in your question.

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Related Hot Network Questions. Question feed.Here is my assignment: In Chapter 5, you created a lottery game application.

Create a similar game using check boxes. For this game, generate six random numbers, each between 0 and 30 inclusive. Allow the user to choose six check boxes to play the game. Do not allow the user to choose more than six boxes. The primary issue I am having is with the limiting of checkboxes, I cannot seem to find examples of this in the text or anywhere online except in javascript and html, which obviously do not help me here. I have posted my code below. Please note that I am only looking for answers to the limit on check boxes at the moment the rest of the code I can complete myself.

When you say add lotteryNumber are you mapping this to anything else? I can see how this would create a loop no greater than 6 but I am not seeing how it limits the users choice of check box. Please elaborate. This in particular is what I am trying to do. I understand using a loop to limit the number of random numbers, I had just created several number generators so i will be adjusting it to use the loop thank you.

lotto number with java fx

Id also suggest making the assignation of random numbers in a method so that its reusable when you want to generate more than 1 set of winning numbers per execution of your program. The for loops from 0 to 5the if within that very loop checks if the value is over 6. Solutiondrop all the loops and ifs in the "public void itemStateChanged ItemEvent check " If user is un-selecting a selected checkbox, then iNbChecked--; and thats it.

java lottery game

Im not going to get into how but there is surely a way to do your "public void itemStateChanged ItemEvent check " without 30 ifs for 30 checkboxes, all their names are standarized, use String functions to isolate number and then do the code once with that number and your checkbox array.

Thanks all. This is very helpful. And yes I see the issue with doing so many if statements much easier to use a checkbox array. Thanks for the help. Okay this is what I am doing now. IllegalArgumentException: adding a window to a container at java. Good luck : look at your code, and imagine i ask you to do the same concept with checkboxes in a by grid, THAT is why you are going the wrong way about it and learning how to do this now will make you a better programmer in the long run!

Edited 8 Years Ago by Philippe. Lahaie : typo. Getting Started: Have something to contribute to this discussion? Please be thoughtful, detailed and courteous, and adhere to our posting rules. Edit Preview. H1 H2. Post Reply. Insert Code Block. Share Post. Permanent Link.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. In the last days I've written a number guessing game that I've posted on this site. I have now written a lottery simulation in which I tried to acknowledge the criticisms of the project mentioned above. I also tried to add error handling. If the user enters invalid numbers or complete bullshit, the program will not crash any longer. You can test the program here. Dont wonder: The online interpreter needs a little time before it start the program.

Have I sufficiently implemented the criticism of the last Code Review? Are there new things that should be better? I saw this came up in your previous question, too, but Main is not a good name. As someone seeing your code for the first time, I have no idea what Main is - I know from the name that it's the entrypoint to your logic, but I have no idea what logic it's the entrypoint for.

What does it do? It runs the lottery game. I already know what type of logic to expect a main method and what system the logic belongs to. Magic numbers: I don't know what 61and 49 mean.

I see them defined in another class, but it's a pain to have to look there every time I need to double check whether it's 6 draw size and 1 lower limit, or 1 draw size and 6 lower limit. Use variables just like you do in the other class, so when you need to change them later you can be sure you're changing the one you think you're changing, without needing to count its index in the parameters to be sure.

Whether it's necessary to pull out parameters into temporary variables varies, but in this case there are two strong arguments for it: 1. Configuration, as much as possible, should be pulled out of logic, so that when you need to change the configuration, you're not touching a line of logic.

Lottery algorithm in Java

Try-catch blocks should generally not be used for normal logic. A good rule of thumb is that, if the same method keeps running after the try-catch block is executed, it shouldn't be a try-catch block there are a lot of caveats to this; one very common pattern that rightfully breaks this rule is failing slowly - running a processing loop over a collection that processes every item, catching every exception and waiting until the end to throw them all.

In this case, you're using the try-catch to enable a loop in the logic itself. Instead, just check whether all the numbers the user has given you were unique:. If that's set in stone, then they shouldn't be input parameters above. If it's not set in stone, those same variables should be used here - you'll probably need to pull them out into public final static constants.

Also, is there ever a case when you're not immediately printing the result of this method? If there is not, then it would be simpler to rename it to public void printExplanationString and have it System.

Use the same uniqueness checking as above - it'll be much shorter, and it's actually more efficient than a nested loop :. Rather than generate your own random int s between lowerLimit and upperLimityou can let Random do it for you. Check out Random. What's the maximum value returned by compare?In this challenge we are going to write a Python program that automatically generates six random numbers from 1 to 50 and display them on the screen, sorted in ascending order.

The program will need to make sure that each number is unique; the same number cannot come twice in the selection of six selected numbers. Learning Objectives By completing this code, you will understand the difference between the two types of loops used in Python:. Note The probability of guessing several lottery numbers is very low. You may want to tweak your program to only pick up numbers between 1 and 20 instead of This will give you a better chance to guess some of these numbers and hence test whether your code is working.

Video Tutorial. Get ready for the new computing curriculum. Find new computing challenges to boost your programming skills or spice up your teaching of computer science. Learning Objectives By completing this code, you will understand the difference between the two types of loops used in Python: For Loops Count-Controlled Loops : A count-controlled loop is one that is executed a certain number of times.

In our example, because we know that we need exactly six numbers we are going to use a for loop to repeat iterate through some of our code exactly six times. While Loops Condition-Controlled Loops : A condition-controlled loop such as a While loop keeps going while a certain condition is true.

java lottery game

As soon as the condition becomes false, the loop stops iterating. In our case, when generating a random number, we are going the check that the new number has not already been picked up. If it has then we are going to generate a new one and will carry on doing so till we get a number that has not already been picked up. Check the code Your Challenge Complete this code to store your own selection of six numbers.

For testing purposes, you can store these numbers directly into the code and display these to the end-user. Alternatively you can ask the end-user to type six numbers. Then your code will use the program given above to generate the six lottery numbers. Other challenges you may enjoy Yes or No!

Year Cinema Booking Challenge My daily routine. Tagged with: iterationListPython Challenge. Search for:. Recent Posts. View more recent posts View all our challenges Take a Quiz Our Latest Book. View all books. Follow this blog. Email Address. Related Posts.Highly configurable. Lottery DApp-is a lottery web app in which a user can guess a number between 1 an d The onwer of the contract will draw a winner after every round of lottery. I made this lottery to experiment with and get a grasp of the full-stack process behind creating Ethereum DApps.

Smart Contracts for QChain Lottery project it's not production version — random vulnerability. A lottery drawing application that randomly draws numbers from 1 to 99, and displays them on a table. Add a description, image, and links to the lottery-game topic page so that developers can more easily learn about it. Curate this topic. To associate your repository with the lottery-game topic, visit your repo's landing page and select "manage topics. Learn more. Skip to content. Here are 30 public repositories matching this topic Language: All Filter by language.

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Lottery Numbers

Star 9. A lottery game app for parties, weddings, team buildings, etc. Updated Apr 16, JavaScript. Lottery Turntable using by Vue 2. Updated Jul 20, JavaScript. Star 4. Updated Jan 24, PHP.Leave a Reply. Bloggerized by DheTemplate. Pages Home. Sunday, January 15, A lottery requires that you select six different numbers from the integers 1 to Write a program to do this for you and generate five sets of entries.

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java lottery game

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