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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.

Solutions on the web

via Stack Overflow by testerjoe2
, 1 year ago
This exception has no message.
via Stack Overflow by StoreCode
, 4 months ago
via GitHub by trigun0x2
, 2 years ago
This exception has no message.
via GitHub by trigun0x2
, 2 years ago
This exception has no message.
via GitHub by mouse07410
, 1 year ago
via Oracle Community by 843797, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at java.io.Reader.(Reader.java:78)	at java.io.InputStreamReader.(InputStreamReader.java:72)	at GmailQuickstart.authorize(GmailQuickstart.java:68)	at GmailQuickstart.getGmailService(GmailQuickstart.java:91)	at GmailQuickstart.main(GmailQuickstart.java:99)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:483)	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)