title: How to load images from css file in JavaFX 8
body: <p>I have this css file which loads images in JavaFX 8 application:</p>
  
  <pre><code>#pill-left {  
      -fx-padding: 5;  
       -fx-border-image-source: url("/com/dx57dc/images/left-btn.png");  
      -fx-border-image-slice: 4 4 4 4 fill;  
      -fx-border-image-width: 4 4 4 4;  
      -fx-border-image-insets: 0;  
      -fx-border-image-repeat: stretch;  
       -fx-background-color: null !important;  
  }  
  #pill-left:selected { -fx-border-image-source: url("/com/dx57dc/images/left-btn-selected.png"); }  
  #pill-left .label {  
      -fx-text-fill: #d3d3d3;  
      -fx-effect: dropshadow( one-pass-box , rgba(0,0,0,0.75) , 0, 0.0 , 0 , -1 );  
   }  
  #pill-left:selected .label {  
      /* -fx-text-fill: black; */  
      -fx-text-fill: white;  
      -fx-effect: dropshadow( one-pass-box , white , 0, 0.0 , 0 , 1 );  
  }  
  #pill-center {  
      -fx-padding: 5;  
       -fx-border-image-source: url("/com/dx57dc/images/center-btn.png");  
      -fx-border-image-slice: 4 4 4 4 fill;  
      -fx-border-image-width: 4 4 4 4;  
      -fx-border-image-insets: 0;  
      -fx-border-image-repeat: stretch;  
       -fx-background-color: null !important;  
  }  
  #pill-center:selected { -fx-border-image-source: url("/com/dx57dc/images/center-btn-selected.png"); }  
  #pill-center .label {  
      -fx-text-fill: #d3d3d3;  
       -fx-effect: dropshadow( one-pass-box , rgba(0,0,0,0.75) , 0, 0.0 , 0 , -1 );  
  }  
  #pill-center:selected .label {  
      -fx-text-fill: black;  
      -fx-effect: dropshadow( one-pass-box , white , 0, 0.0 , 0 , 1 );  
   }  
  #pill-right {  
      -fx-padding: 5;  
      -fx-border-image-source: url("/com/dx57dc/images/right-btn.png");  
      -fx-border-image-slice: 4 4 4 4 fill;  
      -fx-border-image-width: 4 4 4 4;  
      -fx-border-image-insets: 0;  
       -fx-border-image-repeat: stretch;  
      -fx-background-color: null !important;  
  }  
  #pill-right:selected { -fx-border-image-source: url("/com/dx57dc/images/right-btn-selected.png"); }  
  #pill-right .label {  
       -fx-text-fill: #d3d3d3;  
      -fx-effect: dropshadow( one-pass-box , rgba(0,0,0,0.75) , 0, 0.0 , 0 , -1 );  
  }  
  #pill-right:selected .label {  
      -fx-text-fill: black;  
      -fx-effect: dropshadow( one-pass-box , white , 0, 0.0 , 0 , 1 );  
   }  
  </code></pre>
  
  <p>The images are located at the Java package com.dx57dc.images</p>
  
  <p>In Java 7_25 this code works as expected but in JavaFX 8 b99 I get this error:</p>
  
  <pre><code>ava.lang.NullPointerException
  
  at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:1129)
  
  at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:1598)
  
  at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1520)
  
  at com.sun.javafx.sg.prism.NGGroup.renderChildren(NGGroup.java:233)
  
  at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:199)
  
  at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:1249)
  
  at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:1598)
  
  at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1520)
  
  at com.sun.javafx.sg.prism.NGGroup.renderChildren(NGGroup.java:233)
  
  at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:199)
  
  at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:1249)
  
  at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:1598)
  
  at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1520)
  
  at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:99)
  
  at com.sun.javafx.tk.quantum.AbstractPainter.paintImpl(AbstractPainter.java:210)
  
  at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:95)
  
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
  
  at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
  
  at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
  
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  
  at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:129)
  
  at java.lang.Thread.run(Thread.java:724)
  
  D3D Vram Pool: 13,331,480 used (5.0%), 13,331,480 managed (5.0%), 268,435,456 total
  
  20 total resources being managed
  
  4 permanent resources (20.0%)
  
  1 resources locked (5.0%)
  
  7 resources contain interesting data (35.0%)
  
  0 resources disappeared (0.0%)
  
  
  
  D3D Vram Pool: 13,331,480 used (5.0%), 13,331,480 managed (5.0%), 268,435,456 total
  
  20 total resources being managed
  
  4 permanent resources (20.0%)
  
  1 resources locked (5.0%)
  
  7 resources contain interesting data (35.0%)
  
  0 resources disappeared (0.0%)
  
  
  
  D3D Vram Pool: 13,331,480 used (5.0%), 13,331,480 managed (5.0%), 268,435,456 total
  
  20 total resources being managed
  
  4 permanent resources (20.0%)
  
  1 resources locked (5.0%)
  
  7 resources contain interesting data (35.0%)
  
  0 resources disappeared (0.0%)
  </code></pre>
  
  <p>What is the proper way to load images from css in Java 8?</p>