title: Can't add Java Applications in Eclipse Run Configurations after upgrading to 4.7
body: <p>My application isn't running correctly with Java 9. In order to debug it, I upgraded to Eclipse 4.7 (oxygen) since Neon doesn't have Java 9 support, and applied the Java 9 support patch.</p>
  
  <p>After doing so, eclipse was failing to load any of my pre-existing Java Applications. Thinking it might be a version difference thing, I deleted them, to try re-adding.  But when I click the "New" button to add a configuration, nothing happens.</p>
  
  <p>If I double-click "Java Application," I get the following error:</p>
  
  <blockquote>
    <p>An error has occurred. See error log for more details.<br>
    tried to access method org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsDialog.getTabViewer()Lorg/eclipse/debug/internal/ui/launchConfigurations/LaunchConfigurationTabGroupViewer; from class org.eclipse.jdt.internal.debug.ui.launcher.LocalJavaApplicationTabGroup</p>
  </blockquote>
  
  <p>I am able to add configurations for other types of applications (Java Applet, Eclipse Application) so it seems only to be an issue with Java Applications.</p>
  
  <p>I also tried a fresh workspace, but that has the same issue.  How can I fix this?</p>