title: Codename One simulator stopped working after Android build
body: <p>I'm having an issue very similar to <a href="https://stackoverflow.com/questions/22729090/codenameone-stopped-working-after-build">this one</a>. I have a Codename One project in Eclipse that was working in the simulator, but after a successful Android build, the simulator suddenly no longer works. It throws all these errors:</p>
  
  <pre><code>    Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel
      at com.codename1.impl.ImplementationFactory.createImplementation(ImplementationFactory.java:69)
      at com.codename1.ui.Display.init(Display.java:566)
      at com.codename1.impl.javase.Executor$1.run(Executor.java:112)
      at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
      at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
      at java.awt.EventQueue.access$500(EventQueue.java:97)
      at java.awt.EventQueue$3.run(EventQueue.java:709)
      at java.awt.EventQueue$3.run(EventQueue.java:703)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
      at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
      at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
      at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
  Caused by: java.lang.ClassNotFoundException: javafx.embed.swing.JFXPanel
      at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
      at java.lang.ClassLoader.findSystemClass(ClassLoader.java:1004)
      at com.codename1.impl.javase.ClassPathLoader.findClass(ClassPathLoader.java:100)
      at com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:50)
      ... 17 more
  </code></pre>
  
  <p>I am using the latest version of Eclipse running on Ubuntu. Could this be specific to the OS or IDE? It throws no errors when building and says "Build successful", so the problem seems to be isolated to the simulator itself. There may be something simple I am missing? Any suggestions?</p>