java.lang.IllegalArgumentException: file:/softwares/android-sdk-linux/docs/reference is not a valid classpath entry; it must end with a slash.
   at org.netbeans.modules.java.classpath.SimplePathResourceImplementation.verify(SimplePathResourceImplementation.java:113)
   at org.netbeans.modules.java.classpath.SimplePathResourceImplementation.verify(SimplePathResourceImplementation.java:68)
   at org.netbeans.modules.java.classpath.SimplePathResourceImplementation.<init>(SimplePathResourceImplementation.java:131)
   at org.netbeans.spi.java.classpath.support.ClassPathSupport.createResource(ClassPathSupport.java:77)
   at org.netbeans.spi.java.classpath.support.ClassPathSupport.createClassPath(ClassPathSupport.java:147)
   at org.netbeans.modules.javadoc.search.JavadocRegistry.getDocRoots(JavadocRegistry.java:132)
   at org.netbeans.modules.javadoc.search.IndexBuilder.refreshIndex(IndexBuilder.java:183)
   at org.netbeans.modules.javadoc.search.IndexBuilder.run(IndexBuilder.java:129)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalArgumentException: file:/softwares/android-sdk-linux/docs/reference is not a valid classpath entry; it must end with a slash.
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1464)
   at org.netbeans.modules.javadoc.search.IndexBuilder.scheduleTask(IndexBuilder.java:306)
   at org.netbeans.modules.javadoc.search.IndexBuilder.getDefault(IndexBuilder.java:124)
   at org.netbeans.modules.javadoc.search.IndexOverviewAction$IndexMenu.getPopupMenu2(IndexOverviewAction.java:146)
   at org.netbeans.modules.javadoc.search.IndexOverviewAction$IndexMenu$1.stateChanged(IndexOverviewAction.java:119)
   at javax.swing.DefaultButtonModel.fireStateChanged(DefaultButtonModel.java:349)
   at javax.swing.DefaultButtonModel.setSelected(DefaultButtonModel.java:232)
   at javax.swing.JMenu.setSelected(JMenu.java:305)
   at javax.swing.JMenu.menuSelectionChanged(JMenu.java:1186)
   at javax.swing.MenuSelectionManager.setSelectedPath(MenuSelectionManager.java:118)
   at javax.swing.plaf.basic.BasicMenuUI$Handler.mouseEntered(BasicMenuUI.java:511)
   at java.awt.Component.processMouseEvent(Component.java:6536)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6292)
   at java.awt.Container.processEvent(Container.java:2234)
   at java.awt.Component.dispatchEventImpl(Component.java:4883)
   at java.awt.Container.dispatchEventImpl(Container.java:2292)
   at java.awt.Component.dispatchEvent(Component.java:4705)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4898)
   at java.awt.LightweightDispatcher.retargetMouseEnterExit(LightweightDispatcher.java:4686)
   at java.awt.LightweightDispatcher.trackMouseEnterExit(LightweightDispatcher.java:4665)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4514)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4462)
   at java.awt.Container.dispatchEventImpl(Container.java:2278)
   at java.awt.Window.dispatchEventImpl(Window.java:2739)
   at java.awt.Component.dispatchEvent(Component.java:4705)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:719)
   at java.awt.EventQueue$4.run(EventQueue.java:717)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   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)