title: JDeveloper 11g Not Opening
body: <p>I am trying to open up jdeveloper 11g and it is doing nothing. I am getting the following error when I run jdev.exe</p>
  
  <pre><code>IDE boot startup failed.
  java.lang.NoClassDefFoundError: oracle/classloader/SharedCodeSourceURL
          at oracle.ide.boot.IdeLauncher.initURLStreamHandlerFactory(IdeLauncher.j
  ava:146)
          at oracle.ide.boot.IdeLauncher.launchImpl(IdeLauncher.java:87)
          at oracle.ide.boot.IdeLauncher.launch(IdeLauncher.java:65)
          at oracle.ide.boot.IdeLauncher.main(IdeLauncher.java:54)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
  java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
  sorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at oracle.ide.boot.Launcher.invokeMain(Launcher.java:713)
          at oracle.ide.boot.Launcher.launchImpl(Launcher.java:115)
          at oracle.ide.boot.Launcher.launch(Launcher.java:68)
          at oracle.ide.boot.Launcher.main(Launcher.java:57)
  Caused by: java.lang.ClassNotFoundException: oracle.classloader.SharedCodeSource
  URL
          at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:305)
          at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:246)
  </code></pre>
  
  <p>I attempted to install oracle servicce bus and oracle database express edition, is it possible that some file was overwritten?</p>