title: Why cannot JAR find resources?
body: <p>I have two classes (<code>Play</code> and <code>editor</code>). <code>editor</code> uses <code>Play</code>. <code>Play</code> uses some external files. I imported them into Eclipse in order to address them straight (as you can see on the first screenshot).
  <img src="https://i.stack.imgur.com/D36vh.png" alt="enter image description here">
  I want JAR to be able to contain these files withing and be able to work with (import) them. Is that possible? What options should I choose while exporting project to JAR?</p>