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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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via Oracle Community by 807555, 1 year ago
This exception has no message.
via Google Groups by Gudjon I. Gudjonsson, 3 months ago
via jabref by amritrajpatra
, 2 years ago
This exception has no message.
via Oracle Community by tkjain, 1 year ago
via Oracle Community by 615670, 2 years ago
This exception has no message.
java.lang.NullPointerException at java.util.Hashtable.put( at javax.swing.plaf.basic.BasicToolBarUI.setBorderToNonRollover( at javax.swing.plaf.basic.BasicToolBarUI$ToolBarContListener.componentAdded( at java.awt.Container.processContainerEvent( at java.awt.Container.processEvent( at java.awt.Component.dispatchEventImpl( at java.awt.Container.dispatchEventImpl( at java.awt.Component.dispatchEvent( at java.awt.Container.addImpl( at javax.swing.JToolBar.addImpl( at java.awt.Container.add( at com.temenos.devstudio.EditorUI.jbInit( at com.temenos.devstudio.EditorUI.<init>( at com.temenos.devstudio.Editor.<init>( at com.temenos.devstudio.Editor.main(