About pom.xml run and outputs - maven

Question

I am new to pom and i run the below pom.xml it executed successfully but there is no results found in under target folder.
please tell me how to execute my pom and where i found my results (Like : Outputs)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>xx_groupid</groupId>
<artifactId>yy_artifactid</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>yy_artifactid</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>2.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.15</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.15</version>
</plugin>
</plugins>
</build>
</project>

Answer 1

the pom is valid, try:
mvn package
if everything goes well, maven will package your project into a jar file at target/yy_artifactid-0.0.1-SNAPSHOT.jar
--edit--
you can use Exec Maven Plugin to run java programs
add the the plugin to your pom.xml:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<classpath/>
<argument>org.example.Main</argument>
</arguments>
</configuration>
</plugin>
remember to change the org.example.Main to the main class of your program which should contains a static entry method: ** public static void main (String[] args)**
and then run: mvn compile exec:exec
to execute the unit tests of your application, put test cases under src/test/java fold, and run mvn test