ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Java Source Code: A Recursive Asterisk Diamond Shape Program

Updated on October 31, 2013

Get A Website Plus a Free Domain Name in Just 1 Hour!

Bring the new technology in your hands! Share your skills, improve and impress. Get Your Own Website and a Free Domain Name Here!

Below is the Java source code on getting a diamond shape of asterisks using recursion. Recursion is way that repeat the codes over and over until the condition is met. It is like the for, while and do-while loops. This program I made on outputting a diamond shape asterisk prompts for the user to enter the number and the program will output the asterisks in diamond shape. The size of the diamond depends on the number that the user will enter. You can study and trace the code below.



Java Source Code: A Recursive Asterisk Diamond Shape

//java class


public class Diamond
{
    public String Diamond_Asterisk(int num) //method1
    {
        if(num>0)
        {
            return "*-" + Diamond_Asterisk(num-1);
        }
        else
        {
            return "-";
        }
    }
     public String Diamond_Asterisk2(int num)//method2
    {
        if(num>0)
        {
            return "-*-" + Diamond_Asterisk(num-1);//access method1
        }
        else
        {
            return "-";
        }
    }

    public String Space(int num) //method3
    {
        if(num>0)
        {
            return "-" + Space(num-1);
        }
        else
        {
            return "-";
        }
    }
    public void DiamondResult(int num)//method4
    {
        for(int i=1; i<num; i++)
        {
            System.out.print(Space(num-i));//access method3
             System.out.println(Diamond_Asterisk(i));//access method1
            
        }
         for(int i=0; i<num; i++)
        {
            System.out.println(Diamond_Asterisk2(num-i));//access method2
            System.out.print(Space(i));//access method3

        }
     
    }
    

}


//main class


import java.util.Scanner;

public class Main {

    public static void main(String[] args) 
    {
        Scanner input = new Scanner(System.in);

        System.out.print("Enter a number: ");
        int num = input.nextInt();

        Diamond access = new Diamond();
        System.out.println("The shape for this is: ");
        access.DiamondResult(num);
        
    }

}

Note: You can revise the program by changing the dashes into spaces, I just use the dash in order to show the diamond shape generated by the program.

Sample Output 1:

Enter a number: 3

The shape for this is:

---*--

--*-*--

-*-*-*--

--*-*--

---*--

Sample Output 2:

Enter a number: 4

The shape for this is:

----*--

---*-*--

--*-*-*--

-*-*-*-*--

--*-*-*--

---*-*--

----*--


Sample Output 3:

Enter a number: 5

The shape for this is:

-----*--

----*-*--

---*-*-*--

--*-*-*-*--

-*-*-*-*-*--

--*-*-*-*--

---*-*-*--

----*-*--

-----*--


Source: facebook.com via google image
Source: facebook.com via google image

Do You Like Java Programming?

See results

Comments

    0 of 8192 characters used
    Post Comment
    • aisha91 profile imageAUTHOR

      Rasna Aisha 

      6 years ago from Manila, Philippines

      Welcome ankit, I'll try to add more projects if I'll have the luxury of free time in the future. You can visit my other Java programs as well or visit the site in the future for other references and added projects. Have a nice day ahead.

    • profile image

      ankit 

      6 years ago

      Thanks for this tutorial ,it will be more nice if u add some java project tutorial,or projects made by you in java that will help a lot for learning

      java a better way.

    • aisha91 profile imageAUTHOR

      Rasna Aisha 

      7 years ago from Manila, Philippines

      Thanks dwachira for your kind comment. It is really fulfilling to share what you know. I've got to visit your Java hubs too, it might teach me new things. Happy hubbing to you, may you enjoy your stay here on hubpages. :)

    • dwachira profile image

      [ Danson Wachira ] 

      7 years ago from Nairobi, Kenya

      Thanks aisha91, you've really taken me years back when we used to have fun with loops. It was enjoyable to instruct the computer to do the same thing again and again, in fact one of my popular lessons remains to be loops. Enjoy your day.

    • profile image

      WhydThatHappen 

      7 years ago

      I learned different programming languages and now I'm trying to work with java, wasn't sure what the capabilities and language looked like and started looking into recursion for practical purposes: after much searching I finally found the answer here on hubpages, next time I will search hubpages first! Voting up and sharing

    • aisha91 profile imageAUTHOR

      Rasna Aisha 

      7 years ago from Manila, Philippines

      hi alocsin,

      Thank you for appreciating, voting and rating it. Yes programming is really fun, there is no maximum number that stopping the program so it is applicable for any number. :)

    • alocsin profile image

      Aurelio Locsin 

      7 years ago from Orange County, CA

      How fun. I'm going to try this out. There's no max limit on the number? Voting this Up and Useful.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)