title: How to build java project using Maven?
body: <p>I am using maven version 3.0.4.I am beginner in maven.I created a Hello world Java project using eclipse.</p>
  
  <p>Now using maven I want to make a executable jar of it and run it.I am not getting how to do.
  I also googled for it but what I got is how to create a java project not how to build an existing a java project.</p>
  
  <p>Help me out.</p>