title: Cannot run java class from command line
body: <p>I created a package in Eclipse and ran my HelloWorld just fine from Eclipse. </p>
  
  <p>When I went to a command prompt and navigated to that folder and ran javac HelloWorld.java, it compilied without issue. </p>
  
  <p>When I ran java HelloWorld, I got 
  Error: Could not find or load main class HelloWorld </p>
  
  <p>I also tried java Hello.HelloWorld thinking that it might be because it had a package declaration</p>
  
  <pre><code>package Hello; 
  public class HelloWorld { 
      public static void main(String[] args) { 
         System.out.println("Hi there. How you doin?");
     } 
  }
  </code></pre>