How to access a non-String-Object from ResourceBundle inside fxml

Hi, I got a question. I have a Resource class that extends java.util.ListResourceBundle, which holds several values. These are not only Strings but also doubles, for example. Now I want to access these values inside my FXML. It works very easy with String resources with the % sign, but did not work for me with any other type.

Here is some example code:

Resource class:

<span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">Resources</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">ListResourceBundle</span><span class="pln"> </span><span class="pun">{</span><span class="pln"><br/><br/>   </span><span class="kwd">private</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">final</span><span class="pln"> </span><span class="typ">Object</span><span class="pun">[][]</span><span class="pln"> OBJECTS </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Object</span><span class="pun">[][]{</span><span class="pln"><br/>   </span><span class="pun">{</span><span class="str">"FOO"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"foo"</span><span class="pun">},</span><span class="pln"><br/>   </span><span class="pun">{</span><span class="str">"BAR"</span><span class="pun">,</span><span class="pln"> </span><span class="lit">123d</span><span class="pun">}</span><span class="pln"><br/>   </span><span class="pun">}</span><span class="pln"><br/><br/>   </span><span class="lit">@Override</span><span class="pln"><br/>   </span><span class="kwd">protected</span><span class="pln"> </span><span class="typ">Object</span><span class="pun">[][]</span><span class="pln"> getContents</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"><br/>   </span><span class="kwd">return</span><span class="pln"> OBJECTS</span><span class="pun">;</span><span class="pln"><br/>   </span><span class="pun">}</span><span class="pln"><br/></span><span class="pun"></span>

<span class="pun">}</span>

Loading the FXML in Application class:

<span class="typ">Resources</span><span class="pln"> resources </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Resources</span><span class="pun">();</span><span class="pln"><br/></span><span class="typ">FXMLLoader</span><span class="pln"> loader </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">FXMLLoader</span><span class="pun">(</span><span class="pln">getClass</span><span class="pun">().</span><span class="pln">getResource</span><span class="pun">(</span><span class="str">"/foo.fxml"</span><span class="pun">),</span><span class="pln"> resources</span><span class="pun">);</span><span class="pln"><br/></span><span class="typ">Parent</span><span class="pln"> root </span><span class="pun">=</span><span class="pln"> loader</span><span class="pun">.</span><span class="pln">load</span><span class="pun">();</span>

FXML:

<span class="pun"><</span><span class="typ">Label</span><span class="pln"> text</span><span class="pun">=</span><span class="str">"%FOO"</span><span class="pun">></span><span class="pln"><br/></span><span class="pun"><</span><span class="typ">Polygon</span><span class="pun">></span><span class="pln"><br/>   </span><span class="pun"><</span><span class="pln">points</span><span class="pun">></span><span class="pln"><br/>   </span><span class="pun"><</span><span class="typ">Double</span><span class="pln"> fx</span><span class="pun">:</span><span class="pln">value</span><span class="pun">=</span><span class="str">"0"</span><span class="pun">/></span><span class="pln"><br/>   </span><span class="pun"><</span><span class="typ">Double</span><span class="pln"> fx</span><span class="pun">:</span><span class="pln">value</span><span class="pun">=</span><span class="str">"0"</span><span class="pun">/></span><span class="pln"><br/>   </span><span class="pun"><</span><span class="typ">Double</span><span class="pln"> fx</span><span class="pun">:</span><span class="pln">value</span><span class="pun">=</span><span class="str">"%BAR"</span><span class="pun">/></span><span class="pln"><br/>   </span><span class="pun"><</span><span class="typ">Double</span><span class="pln"> fx</span><span class="pun">:</span><span class="pln">value</span><span class="pun">=</span><span class="str">"0"</span><span class="pun">/></span><span class="pln"><br/>   </span><span class="pun"></</span><span class="pln">points</span><span class="pun">></span><span class="pln"><br/></span><span class="pun"></</span><span class="typ">Polygon</span><span class="pun">></span>

The first line in FXML works perfectly fine, however the line with %BAR crashes with <span class="pln">javafx</span><span class="pun">.</span><span class="pln">fxml</span><span class="pun">.</span><span class="typ">LoadException</span><span class="pun"></span><span class="pln"></span>

I posted this question on SO two weeks ago but never got an answer. (java - JavaFX: Access in FXML to a non-String-Object from a ResourceBundle - Stack Overflow )

I hope you can help me.

Thanks a lot!