title: getClass().getResource("/") returns null in command line
body: <p>I'm trying to read a file in my maven project at /src/main/resources/file.txt.</p>
  
  <p>I'm using </p>
  
  <pre><code>URL url=this.getClass().getResource("/");
  String filePath=url.getPath()+"file.txt";
  </code></pre>
  
  <p>url object gets the correct value when this is run thru eclipse.</p>
  
  <p>But, when I package the jar and run it in command line:</p>
  
  <pre><code>jar -cp myjar.jar SampleTest
  </code></pre>
  
  <p>It returns null for 'url' object and throws a NullPointerException in the next line.</p>
  
  <p>I have openend my Jar file using file browser and checked. It has the 'file.txt' in "/" location inside the Jar.</p>
  
  <p>Where am I going wrong ?</p>