Main class execution maven or java command

Question

I have a simple java main class and can execute it using the below command on server java com.....MainClass

Now we are trying to use Maven in our application.

I am seeing on web that the maven command to execute java program is mvn exec:java -Dexec.mainClass=com......MainClass

Can I still use regular java command or do I have to use the maven command exec:java?

It's not clear to me when to use the maven exec:java command.

Please help me understand when to use regular java command and when to use the maven exec:java command. when I use Maven can I still execute program using regular java command.

haba713 · Accepted Answer · 2019-01-30 16:12:44Z

1

Maven

According to https://maven.apache.org/what-is-maven.html Maven's objectives are

Making the build process easy
Providing a uniform build system
Providing quality project information
Providing guidelines for best practices development
Allowing transparent migration to new features

So, you should use Maven for building your project... like building a JAR package with main class.

Running JAR packaged main class

See this answer or this Oracle's tutorial for running a JAR packaged Java class.

You can also use Maven for running the main class but you should not make your production environment depended on Maven.

answered Jan 30, 2019 at 16:12

haba713

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salah djebbi · Accepted Answer · 2019-01-30 16:13:53Z

1

maven is mainly a dependency mangement and a build tool.

u can still use java command to run your main class from the jar generated by maven under the target folder of your project.

java -cp "yourProject/target/folder-containing-dependenc-jars-if-exist/*:yourProject/target/thejar.jar" package.mainClass

ps: use the ":" separator on linux system , if you are under windows use ";"

answered Jan 30, 2019 at 16:13

salah djebbi

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Main class execution maven or java command

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