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    Thrown when an application is trying to use or access an object whose reference equals to null but if you are getting no message, try using the option -XX:-OmitStackTraceInFastThrow.

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via GitHub by ex00
, 1 year ago
This exception has no message.
via Google Groups by Stefan Bielenberg, 9 months ago
This exception has no message.
via Google Groups by Undeleterious, 10 months ago
via Oracle Community by 807592, 1 year ago
This exception has no message.
java.lang.NullPointerException at java.io.Reader.<init>(Reader.java:61) at java.io.InputStreamReader.<init>(InputStreamReader.java:80) at org.simpleframework.xml.core.Persister.read(Persister.java:471) at org.simpleframework.xml.core.Persister.read(Persister.java:452) at deviceContainer.DeviceCollectionXMLAO.readXML(DeviceCollectionXMLAO.java:15) at testContainer.Temp.updateNode(Temp.java:44) at testContainer.Temp.main(Temp.java:25)