title: ClassLoader.getResource() doesn't work from .jar file
body: <p>I have the following code:</p>
  
  <pre><code>private final ImageIcon placeHolder = new ImageIcon(this.getClass().getClassLoader().getResource("Cards\\trans.png"));
  </code></pre>
  
  <p>But this does not work once my application exported into a <code>.jar</code> file.</p>