Does a fake data generator exists in Java?

Question

I would like to know if a fake data generator exists for Java. In Perl exists Data::Faker and there's a port to Ruby called faker, for JavaScript faker.js. Someone know about a fake data generator for Java, that can provide random names, phone number, P.O. box number, etc...

I've never seen something like this (in the libraries java is shipping with). Maybe there is a 3rd party library that does that for you in Java. In this case you should use a search engine to find out :) — Thomas Jungblut, Jun 15 '11 at 19:25
Checkout [ThinkUI](http://www.thinkui.com/datagen/index.html) — Bala R, Jun 15 '11 at 19:29
I've recently authored a library that can pass as faker-like: https://github.com/nomemory/mockneat — Andrei Ciobanu, Aug 22 '17 at 11:13
You could try [Datafaker](https://www.datafaker.net), a JVM library to generate fake data. It's an up to date version (Disclaimer: maintained by me). — Erik Pragt, Feb 01 '22 at 12:44

score 51 · Answer 1 · edited Oct 04 '17 at 17:10

51

Try jFairy. This is new project in early stage.

Fairy fairy = Fairy.create();
Person person = fairy.person();

System.out.println(person.fullName());            // Chloe Barker
System.out.println(person.email());               // barker@yahoo.com
System.out.println(person.telephoneNumber());     // 690-950-802

Company company = fairy.company();
System.out.println(company.name());          // Robuten Associates
System.out.println(company.url());           // http://www.robuteniaassociates.com

Person salesman = fairy.person(withCompany(company));
System.out.println(salesman.fullName());     // Juan Camacho
System.out.println(salesman.companyEmail()); // juan.camacho@robuteniaassociates.com

PS. I'm a contributor.

edited Oct 04 '17 at 17:10

Nicolas Filotto

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answered Nov 17 '13 at 15:53

MariuszS

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We are working on adding more functionalities right now and a new version will be released soon. – OlgaMaciaszek Feb 10 '15 at 12:12
1

How can i become a contributor too? im using it but it doesnt fit with my real life project. To be clear, it's language based, not locale based (lets say Kanada with french), or whatever you want. Language based is not fitting to a real life project. A phoneNumber is not based on language but on locale. I like the base concept and think its the best open thing by now, but its not fitting with the reality in a big project. By now i just modify the objects per reflection to fit, but i think i can provide something which is more usable. On githu i can not see how i can contribute. – Henning Luther May 08 '16 at 17:37
Any help is always welcome. To contribute use Pull Requests, more to read: https://guides.github.com/activities/contributing-to-open-source/ – MariuszS May 08 '16 at 18:17
How to create test data which can start with word of my choice like "Test Chloe Barker" – Saif Siddiqui May 18 '21 at 12:37

score 16 · Answer 2 · edited Feb 09 '15 at 08:23

16

http://www.andygibson.net/blog/article/generate-test-data-with-datafactory/ How to use:

Add it in your pom.xml

<dependency>
    <groupId>org.fluttercode.datafactory</groupId>
    <artifactId>datafactory</artifactId>
    <version>0.8</version>
    <type>jar</type>
</dependency>

Test it...

public class Main {

public static void main(String[] args) {
    DataFactory df = new DataFactory();
    for (int i = 0; i < 100; i++) {          
        String name = df.getFirstName() + " "+ df.getLastName();
        System.out.println(name);
    }
  }
 }

Output :

Lindsey Craft
Erica Larsen
Ryan Levine
Erika Smith
Brooklyn Sloan
Karen Mayer
Eddie O'neill
Nancy Stevens

edited Feb 09 '15 at 08:23

paul

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answered Jun 16 '11 at 13:53

sgl

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It would be better if you can improve your answer. – Rubens Mariuzzo Sep 03 '13 at 23:18
Also check this: https://dzone.com/articles/generate-test-data-datafactory – akhil_mittal Sep 05 '15 at 11:28
Just what I needed, it appears to work fine. – hat Oct 31 '19 at 13:48

score 15 · Answer 3 · answered Nov 03 '12 at 18:53

15

There is a Java port of the Perl Data::Faker - java-faker

answered Nov 03 '12 at 18:53

Dmytro Chyzhykov

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It's worth to use, indeed. In my opinion it's got a good l10n support. – Dmytro Chyzhykov Nov 06 '12 at 21:28
2

I recently used `java-faker`, and creating an instance of `Faker` thrown a NPE. I proceeded to report an issue for this: http://github.com/DiUS/java-faker/issues/6 – Rubens Mariuzzo Apr 08 '13 at 14:52
Most of built in faker-s are useless. Because there are plenty of them (pokemon, startrek etc) its hard to find useful one. – Krzysztof Aug 06 '21 at 16:56

Tony the Pony · Accepted Answer · 2011-06-15T19:35:42.827

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If you're using Hibernate, try HibernateMock.

Also:

edited Jun 15 '11 at 19:35

answered Jun 15 '11 at 19:30

Tony the Pony

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HibernateMock is no more:-( But has been reborn as http://code.google.com/p/jpamock/ – enkor Mar 09 '12 at 14:42
i tried Benerator.. it seems to be a good project ... but there is little or no gratis support on it.. activiy on this project is very low – arthur Jul 28 '12 at 01:20

Does a fake data generator exists in Java?

4 Answers4

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