Maven hits Fat package (full dependency of jar package) plugin

            <plugin> <artifactId> Maven-assembly-plugin </artifactId> <configuration> <descriptorRefs> <descriptorref>jar -with-dependencies</descriptorref> </descriptorRefs> <archive > <manifest> <mainclass>com.cetc.di.app</ma inclass> </manifest> </archive> </c                             Onfiguration> <executions> <execution>                             <id>make-assembly</id> <phase>package</phase> <goals> <goal>single</goal> </goals                    >    </execution> </executions> </plugin> 

<mainClass>com.cetc.di.App</mainClass>   Declares the   main method of the Java-jar ****.jar runtime

The file that declares the main method for this display is  extracted from the jar package: \meta-inf\manifest. MF  inside shows the main method when the declaration is executed directly  
such as: Main-class:com.corundumstudio.socketio.demo.chatlauncher

If  there are other main methods in the JAR package   to run such a command (Windows environment)  
such as: Java-classpath. \demo-1.0.0-snapshot-jar-with-depeNdencies.jar Com.corundumstudio.socketio.demo.NamespaceChatLauncher
                                                                  Package name--------------------------> contains the class name of the main method to execute

Maven hits Fat package (full dependency of jar package) plugin