Corda uses industry-standard tools to make set-up as simple as possible. Following the software recommendations below will minimize the number of errors you encounter, and make it easier for others to provide support. However, if you do use other tools, we'd be interested to hear about any issues that arise.
Please ensure that you keep your Oracle JDK installation updated to the latest version while working with Corda. Even earlier versions of JDK 8 versions can cause cryptic errors.
Applications on Corda (CorDapps) can be written in any JVM-targeting language. However, Corda itself and most of the samples are written in Kotlin. If you're unfamiliar with Kotlin, there is an official `getting started guide <https://kotlinlang.org/docs/tutorials/>`_.
Please make sure that you're running the latest version of IDEA, as older versions have been known to have problems integrating with Gradle, the build tool used by Corda.
The instructions below will allow you to set up a Corda development environment and run a basic CorDapp on a Windows or Mac machine. If you have any issues, please consult the :doc:`getting-set-up-fault-finding` page, or reach out on `Slack <http://slack.corda.net/>`_ or the `forums <https://discourse.corda.net/>`_.
2. Download and run the executable to install IntelliJ Community Edition (use the default settings)
Download a sample project
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1. Open a command prompt
2. Clone the CorDapp tutorial repo by running ``git clone https://github.com/corda/cordapp-tutorial``
3. Move into the cordapp-tutorial folder by running ``cd cordapp-tutorial``
4. Retrieve a list of all the milestone (i.e. stable) releases by running ``git branch -a --list *release-M*``
5. Check out the latest milestone release by running ``git checkout release-MX`` (where "X" is the latest milestone)
Run from the command prompt
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1. From the cordapp-tutorial folder, deploy the nodes by running ``gradlew deployNodes``
2. Start the nodes by running ``call kotlin-source/build/nodes/runnodes.bat``
3. Wait until all the terminal windows display either "Webserver started up in XX.X sec" or "Node for "NodeC" started up and registered in XX.XX sec"
4. Test the CorDapp is running correctly by visiting the front end at http://localhost:10007/web/example/
Run from IntelliJ
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1. Open IntelliJ Community Edition
2. On the splash screen, click "Open" (do NOT click "Import Project") and select the cordapp-template folder
..warning:: If you click "Import Project" instead of "Open", the project's run configurations will be erased!
3. Once the project is open, click "File > Project Structure". Under "Project SDK:", set the project SDK by clicking "New...", clicking "JDK", and navigating to C:\Program Files\Java\jdk1.8.0_XXX (where "XXX" is the latest minor version number). Click "OK".
4. Click "View > Tool Windows > Event Log", and click "Import Gradle project", then "OK". Wait, and click "OK" again when the "Gradle Project Data To Import" window appears
5. Wait for indexing to finish (a progress bar will display at the bottom-right of the IntelliJ window until indexing is complete)
6. At the top-right of the screen, to the left of the green "play" arrow, you should see a dropdown. In that dropdown, select "Run Example Cordapp - Kotlin" and click the green "play" arrow.
7. Wait until the run windows displays the message "Webserver started up in XX.X sec"
8. Test the CorDapp is running correctly by visiting the front end at http://localhost:10007/web/example/
Mac
~~~
Java
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1. Open "System Preferences > Java"
2. In the Java Control Panel, if an update is available, click "Update Now"
3. In the "Software Update" window, click "Install Update". If required, enter your password and click "Install Helper" when prompted
4. Wait for a pop-up window indicating that you have successfully installed the update, and click "Close"
5. Open a new terminal and type ``java -version`` to test that Java is installed correctly
2. Download and run the executable to install IntelliJ Community Edition (use the default settings)
Download a sample project
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1. Open a terminal
2. Clone the CorDapp tutorial repo by running ``git clone https://github.com/corda/cordapp-tutorial``
3. Move into the cordapp-tutorial folder by running ``cd cordapp-tutorial``
4. Retrieve a list of all the milestone (i.e. stable) releases by running ``git branch -a --list *release-M*``
5. Check out the latest milestone release by running ``git checkout release-MX`` (where "X" is the latest milestone)
Run from the terminal
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1. From the cordapp-tutorial folder, deploy the nodes by running ``./gradlew deployNodes``
2. Start the nodes by running ``kotlin-source/build/nodes/runnodes``. Do not click while 8 additional terminal windows start up.
3. Wait until all the terminal windows display either "Webserver started up in XX.X sec" or "Node for "NodeC" started up and registered in XX.XX sec"
4. Test the CorDapp is running correctly by visiting the front end at http://localhost:10007/web/example/
Run from IntelliJ
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1. Open IntelliJ Community Edition
2. On the splash screen, click "Open" (do NOT click "Import Project") and select the cordapp-template folder
3. Once the project is open, click "File > Project Structure". Under "Project SDK:", set the project SDK by clicking "New...", clicking "JDK", and navigating to /Library/Java/JavaVirtualMachines/jdk1.8.0_XXX (where "XXX" is the latest minor version number). Click "OK".
4. Click "View > Tool Windows > Event Log", and click "Import Gradle project", then "OK". Wait, and click "OK" again when the "Gradle Project Data To Import" window appears
5. Wait for indexing to finish (a progress bar will display at the bottom-right of the IntelliJ window until indexing is complete)
6. At the top-right of the screen, to the left of the green "play" arrow, you should see a dropdown. In that dropdown, select "Run Example Cordapp - Kotlin" and click the green "play" arrow.
7. Wait until the run windows displays the message "Webserver started up in XX.X sec"
8. Test the CorDapp is running correctly by visiting the front end at http://localhost:10007/web/example/
By default, these repos will be on the unstable ``master`` branch. You should check out the latest milestone release instead by running ``git checkout release-M11``.
