title: Main class not found even when its existing
body: <p>i'm working in my tablet a project that i want to run in my raspberry pi. The IDE AIDE,  that i'm using can't export my project as an executable jar file. so i decided to try that by using the command line
  I used:</p>
  
  <pre><code>jar cvf ServerActivities.jar *
  </code></pre>
  
  <p>too create the jar file whichbworked but when i want to start it by using</p>
  
  <pre><code>Java -jar ServerActivities.jar
  </code></pre>
  
  <p>it says that my Main class couldnt be found or loaded, but it exists and contains an main method</p>