Having apt-get installed sweethome3d, it won't start. Here's the output when running it from a terminal:
> sweethome3d
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar
Java 3D: implicit antialiasing enabled
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:459)
at javax.swing.JEditorPane.registerEditorKitForContentType(JEditorPane.java:1247)
at javax.swing.JEditorPane.registerEditorKitForContentType(JEditorPane.java:1229)
at javax.swing.JEditorPane.loadDefaultKitsIfNecessary(JEditorPane.java:1307)
at javax.swing.JEditorPane.getKitTypeRegistry(JEditorPane.java:1264)
at javax.swing.JEditorPane.createEditorKitForContentType(JEditorPane.java:1189)
at javax.swing.JEditorPane.getEditorKitForContentType(JEditorPane.java:1088)
at javax.swing.JEditorPane.setContentType(JEditorPane.java:979)
at javax.swing.JEditorPane.<init>(JEditorPane.java:292)
at com.eteks.sweethome3d.swing.FurnitureCatalogTree$CatalogCellRenderer.<init>(Unknown Source)
at com.eteks.sweethome3d.swing.FurnitureCatalogTree.<init>(Unknown Source)
at com.eteks.sweethome3d.swing.SwingViewFactory.createFurnitureCatalogView(Unknown Source)
at com.eteks.sweethome3d.viewcontroller.FurnitureCatalogController.getView(Unknown Source)
at com.eteks.sweethome3d.swing.HomePane.createCatalogFurniturePane(Unknown Source)
at com.eteks.sweethome3d.swing.HomePane.createMainPane(Unknown Source)
at com.eteks.sweethome3d.swing.HomePane.<init>(Unknown Source)
at com.eteks.sweethome3d.swing.SwingViewFactory.createHomeView(Unknown Source)
at com.eteks.sweethome3d.viewcontroller.HomeController.getView(Unknown Source)
at com.eteks.sweethome3d.HomeFramePane.<init>(Unknown Source)
at com.eteks.sweethome3d.HomeFrameController.getView(Unknown Source)
at com.eteks.sweethome3d.HomeFrameController.displayView(Unknown Source)
at com.eteks.sweethome3d.SweetHome3D$4.collectionChanged(Unknown Source)
at com.eteks.sweethome3d.model.CollectionChangeSupport.fireCollectionChanged(Unknown Source)
at com.eteks.sweethome3d.model.HomeApplication.addHome(Unknown Source)
at com.eteks.sweethome3d.SweetHome3D.showDefaultHomeFrame(Unknown Source)
at com.eteks.sweethome3d.SweetHome3D.start(Unknown Source)
at com.eteks.sweethome3d.SweetHome3D$5.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:749)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:702)
at java.awt.EventQueue$3.run(EventQueue.java:696)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:719)
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)
I can confirm same issue.