Running a class file through "mvn exec:exec"

Question

I am new to maven and facing problems while running a class file through maven

It runs fine with
mvn exec:java -Dexec.mainClass="com.test.Test"

But not with
mvn exec:exec -Dexec.executable=java -Dexec.mainClass="com.test.Test"

It asks for java parameters

F:\data\work\Test>mvn exec:exec -Dexec.executable=java -Dexec.mainClass="com.test.Test"
Usage: java [-options] class [args...]
           (to execute a class)
   or  java [-options] -jar jarfile [args...]
           (to execute a jar file)
where options include:
    -d32          use a 32-bit data model if available
    -d64          use a 64-bit data model if available
    -server       to select the "server" VM
    -hotspot      is a synonym for the "server" VM  [deprecated]
                  The default VM is server.

    -cp <class search path of directories and zip/jar files>
    -classpath <class search path of directories and zip/jar files>
                  A ; separated list of directories, JAR archives,
                  and ZIP archives to search for class files.

I am already providing a class file then why its not able to pick that? I tried providing those even through pom.

I am using exec:exec as I dont want to pass VM arguments from MAVEN_OPTS

here is my pom

<profiles>  
 <profile>  
  <id>fib</id>  
  <build>  
   <plugins>  
    <plugin>  
     <groupId>org.codehaus.mojo</groupId>  
     <artifactId>exec-maven-plugin</artifactId>  
     <version>1.3.2</version>  
     <executions>  
      <execution>  
       <phase>test</phase>  
       <goals>  
        <goal>exec</goal>  
       </goals>  
       <configuration>  
        <mainClass>com.test.Test</mainClass>  
        <executable>java</executable> 
       </configuration>  
      </execution>  
     </executions>  
    </plugin>  
   </plugins>  
  </build>  
 </profile>  
</profiles>

What am I missing?

So 2 questions which arises -
1)What am I missing s that its asking me to pass java parameters despite of passing mainClass?
2)How can I pass VM arguments using exec-maven-plugin?

I have found this for my 2nd question using maven 'exec:exec' with arguments

Answer 1

mvn exec:exec -Dexec.executable=java -Dexec.args="-classpath target/classes -XX:+PrintGCDetails com.test.Test"

also if you are concerned about dependencies being in classpath then make a fat jar and set it in classpath

interesting discussion: https://chat.stackoverflow.com/rooms/67085/discussion-between-biker-and-jigar-joshi