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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 47730, 1 year ago
This exception has no message.
via Oracle Community by 155772, 1 year ago
via Apache Bugzilla by thomas.eliasson, 1 year ago
via GitHub by GoogleCodeExporter
, 1 year ago
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via GitHub by jprante
, 2 years ago
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via Google Groups by Unknown author, 3 months ago
This exception has no message.
java.lang.NullPointerException: 	at java.util.Hashtable.put(Hashtable.java:380)	at oracle.sdoapi.sref.impl.SRManagerImpl.retrieve(SRManagerImpl.java:127)	at sample.SampleNewToSDO.main(SampleNewToSDO.java:47)