Run a Maven Project using IntelliJ IDEA

Question

I'm new to IntelliJ IDEA and I would like to run a simple Maven Quickstart project using it.

I followed all the instructions, the project was sucessfully built. But when I try to compile and run it , the Run button is not activated.

It looks like IntelliJ IDEA couldn't figure out where the main class is.

This is a picture of the project's hierarchy.

What is the problem ? And how can I fix it ?

Thanks !

Try refreshing the Maven project in the Maven Projects tool window, if it doesn't help, refer to [this answer](http://stackoverflow.com/a/42427510/104891) for diagnostics. — CrazyCoder, Mar 01 '17 at 19:17
How exactly did you create the project? Is your JDK setup correct? If you have a valid jdk then right click to java folder and Mark Directory as... and then Source Root. hope it works — hevi, Mar 01 '17 at 19:20

score 22 · Accepted Answer · edited May 23 '17 at 12:32

Refresh the Maven project in the Maven Projects tool window (Reimport All Maven Projects), if it doesn't help, refer to this answer for diagnostics.

The issue is that your source roots were not configured correctly from the Maven model for some reason and the .java file appears in a plain directory instead of the Source root.

You can tell that by the color of the folders and by the icon of the file.

score 11 · Answer 2 · answered Mar 01 '17 at 19:25

11

You need to create a Java Project.

File->New->Project->Java->Next->Next->Finish

Then go to the top and do:

Right click parent folder of project->Add Framework Support->Click Maven->Ok

Now Maven should be added to your project and also you should be able to run it

If this doesn't allow you to run the project, click the little drop down box to the left of the grayed out run button and click Edit Configurations.

Then click the + and click Application and set your Main class to the class that has the main method in it, and then it should allow you to run the application.

Hope that helps!

answered Mar 01 '17 at 19:25

LJP1203

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I have already tried that and it didn't accept my Main class. – user1885868 Mar 01 '17 at 19:30
1

Interesting I just reproduced your exact code and mine worked perfectly fine. The above accepted answer should help you out. – LJP1203 Mar 01 '17 at 19:38
Thanks, It worked for me, just by default IntelliJ set java version to 1.5, to change go to File-> Settings, build,execution,deployment->Compiler->Java Compiler – Juan Rojas Oct 30 '19 at 17:18

score 2 · Answer 3 · answered Mar 01 '17 at 19:18

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Seems like your java directory is not marked as Source root. Right click on it and click Mark directory as -> Source root

answered Mar 01 '17 at 19:18

GreyGoblin

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score 1 · Answer 4 · answered Mar 01 '17 at 19:14

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Have you imported the project as a maven projet ? If yes, click on the body of your fonction and then do CTRL+MAJ+F10 or MAJ+F10

answered Mar 01 '17 at 19:14

CoDel

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I created a new project using IntelliJ's wizard `File --> New --> Project --> Maven` and I have already tried those command and nothing works. It does ask me to edit run confgurations but yet again, it doesn't accept the class `App.java` as a main class – user1885868 Mar 01 '17 at 19:19
Have you set the jdk? – CoDel Mar 01 '17 at 19:26
Yes , I have `1.8` . – user1885868 Mar 01 '17 at 19:28

score 1 · Answer 5 · answered Jan 17 '19 at 09:39

My issue was that I was looking for the equivalent of calling "mvnw" from the console/terminal.

.mnvw (linux) OR mvnw (windows)

I didn't know where this was in IntelliJ. That's how I interpret part of the question that was asked.

The solution wasn't obvious to me so I wanted to share it.

Conceptually, you want to run the default maven configuration (not a specific lifecycle stage). Therefore you need to select the root entry in the Maven panel:

Then you can play the green play button on the panel:

Alternatively, you can right click and run the maven build from the context menu.

score 1 · Answer 6 · answered Feb 06 '22 at 12:36

If maven not visible top-right side then maven plugins not avaiable in your intellij IDE.

Follow below steps: click settings icon(top-right side)->select plugin->click on checkbox at maven option->click apply button then ok button.

After few minutes maven able to see in you IDE.

score 0 · Answer 7 · answered Mar 01 '17 at 19:12

0

You need to add to project e.g. Jetty or Tomcat (compile to WAR & run Tomcat server with this war).

If you will have Jetty maven plugin you will be able to run app via mvn jetty:run (Add this to Maven run configuration)

answered Mar 01 '17 at 19:12

hya

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The project I want to create is a plain Java so why would I need Tomcat or Jetty ? – user1885868 Mar 01 '17 at 19:16
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http://stackoverflow.com/a/9846103/1814524 you could also do something like this if you dont like Tomcat or Jetty ;) – hya Mar 01 '17 at 19:21
It seems interesting ! I'll investigate that. Thanks bro ! – user1885868 Mar 01 '17 at 19:27

Run a Maven Project using IntelliJ IDEA

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