java.lang.SecurityException: All swing access to clipboard should be redirected to ExClipboard
   at org.netbeans.TopSecurityManager.checkWhetherAccessedFromSwingTransfer(TopSecurityManager.java:758)
   at org.netbeans.TopSecurityManager.checkPermission(TopSecurityManager.java:502)
   at sun.awt.X11.XToolkit.getSystemSelection(XToolkit.java:1179)
   at org.netbeans.editor.BaseCaret.getSystemSelection(BaseCaret.java:866)
   at org.netbeans.editor.BaseCaret.updateSystemSelection(BaseCaret.java:857)
   at org.netbeans.editor.BaseCaret.fireStateChanged(BaseCaret.java:974)
   at org.netbeans.editor.BaseCaret.modifiedUpdate(BaseCaret.java:1439)
   at org.netbeans.editor.BaseCaret.atomicUnlock(BaseCaret.java:1458)
   at org.netbeans.editor.BaseDocument$OldListenerAdapter.atomicUnlock(BaseDocument.java:1817)
   at org.netbeans.editor.BaseDocument.fireAtomicUnlock(BaseDocument.java:1879)
   at org.netbeans.editor.BaseDocument.atomicUnlockImpl(BaseDocument.java:1758)
   at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:936)
   at javax.swing.plaf.basic.BasicTextUI$TextTransferHandler.handleReaderImport(BasicTextUI.java:2296)
   at javax.swing.plaf.basic.BasicTextUI$TextTransferHandler.importData(BasicTextUI.java:2502)
   at org.openide.text.QuietEditorPane$DelegatingTransferHandler.importData(QuietEditorPane.java:393)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$ImportingTransferHandler.delegatedImportData(ClipboardHandler.java:657)
   at org.netbeans.modules.java.editor.imports.ClipboardHandler$ImportingTransferHandler.importData(ClipboardHandler.java:566)
   at org.openide.text.QuietEditorPane$DelegatingTransferHandler.importData(QuietEditorPane.java:393)
   at javax.swing.TransferHandler.importData(TransferHandler.java:827)
   at javax.swing.TransferHandler$TransferAction.actionPerformedImpl(TransferHandler.java:1766)
   at javax.swing.TransferHandler$TransferAction.access$800(TransferHandler.java:1692)
   at javax.swing.TransferHandler$TransferAction$1.run(TransferHandler.java:1715)
   at javax.swing.TransferHandler$TransferAction$1.run(TransferHandler.java:1713)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at javax.swing.TransferHandler$TransferAction$2.run(TransferHandler.java:1730)
   at javax.swing.TransferHandler$TransferAction$2.run(TransferHandler.java:1728)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at javax.swing.TransferHandler$TransferAction.actionPerformed(TransferHandler.java:1727)
   at javax.swing.text.JTextComponent.invokeAction(JTextComponent.java:1462)
   at javax.swing.text.JTextComponent.paste(JTextComponent.java:1440)
   at org.netbeans.modules.editor.impl.actions.clipboardhistory.CompletionLayoutPopup.pasteContent(CompletionLayoutPopup.java:651)
   at org.netbeans.modules.editor.impl.actions.clipboardhistory.CompletionLayoutPopup.access$400(CompletionLayoutPopup.java:82)
   at org.netbeans.modules.editor.impl.actions.clipboardhistory.CompletionLayoutPopup$ChMouseAdapter.mouseClicked(CompletionLayoutPopup.java:566)
   at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
   at java.awt.Component.processMouseEvent(Component.java:6528)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
   at java.awt.Component.processEvent(Component.java:6290)
   at java.awt.Container.processEvent(Container.java:2234)
   at java.awt.Component.dispatchEventImpl(Component.java:4881)
   at java.awt.Container.dispatchEventImpl(Container.java:2292)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4898)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4542)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4462)
   at java.awt.Container.dispatchEventImpl(Container.java:2278)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
   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(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:731)
   at java.awt.EventQueue$4.run(EventQueue.java:729)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   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)