title: Exported runnable JAR file from Eclipse doesn't seem to execute
body: <p>(Disclaimer: I am not a Java programmer, and really have very little idea what I'm doing in Eclipse)</p>
  
  <p>I hacked out an application in Eclipse a while back which I finished off and exported as a JAR which runs nicely. I didn't take any notes or make any comments.</p>
  
  <p>The time comes to make some changes to the project but I have to reload it all again because my PC has since been wiped so some settings etc have probably changed.</p>
  
  <p><strong>Anyway it all works and runs nicely from Eclipse. But when I export as a runnable JAR, and double click to run the application, it doesn't seem to execute.</strong></p>
  
  <p>I can see that there is an instance of javaw running, but no window appears. No errors. Nada.</p>
  
  <p>As I said, it works beautifully in Eclipse. Any ideas?</p>
  
  <p>I have little idea of how I can detect what is going on - as I said, I am NOT a java programmer :-)</p>