If you want to create an executable jar file, you need to configure Maven Archiver accordingly. You need to tell it which main class to use. This is done with the <mainClass> configuration element.
Considering this, how do I add main class to manifest?
It is simple.
- Right click on the project.
- Go to Properties.
- Go to Run in Categories tree.
- Set the Main Class in the right side panel.
- Build the project.
- Run main class using Maven. Maven exec plugin provides an option exec:java to run a main class program of your java project. …
- Pass arguments from command. 2.1. …
- Using Plugin configuration. …
- Conclusion.
In this way, how do I run a Maven project in the main method?
The exec-maven-plugin
And we want to execute its main method from the command line via Maven. In order to do this, we can use the exec-maven-plugin. To be more specific, the exec:java goal from this plugin executes the supplied Java class with the enclosing project’s dependencies as the classpath.
How do you create a main class in Java?
To create an object of Main , specify the class name, followed by the object name, and use the keyword new :
- Example. Create an object called ” myObj ” and print the value of x: public class Main { int x = 5; public static void main(String[] args) { Main myObj = new Main(); System. …
- Example. …
- Second.
How do you find the main class in a jar?
Technically a jar file can contain more than one main class. When java executes a jar file, it looks in the META-INF/MANIFEST. MF file inside the jar to find the entrypoint. There is no direct command to get this information, but you can unpack the jar (it’s just a zip file) and look into the manifest yourself.
How do you run a main method in Java?
Call a Method
Inside main , call the myMethod() method: public class Main { static void myMethod() { System. out. println(“I just got executed!”); } public static void main(String[] args) { myMethod(); } } // Outputs “I just got executed!”
What is a Java main method?
Java main method is the entry point of any java program. Its syntax is always public static void main(String[] args) . You can only change the name of String array argument, for example you can change args to myStringArgs .
What is class path Maven?
Maven creates this classpath by considering the project’s dependencies. The reported classpath consists of references to JAR files cached in local Maven repository. Even the JAR artifact of the project is referenced from local Maven cache and not from the /target directory one or the other might expect.
What is mvn exec Java?
Maven exec plugin allows us to execute system and Java programs from the maven command. There are two goals of the maven exec plugin: exec:exec – can be used to execute any program in a separate process. exec:java – can be used to run a Java program in the same VM.
What is the Maven lifecycle?
Maven Lifecycle: Below is a representation of the default Maven lifecycle and its 8 steps: Validate, Compile, Test, Package, Integration test, Verify, Install and Deploy.