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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 RFrank
, 1 year ago
via Coderanch by Josh Bern, 1 year ago
via Stack Overflow by K.B
, 5 months ago
This exception has no message.
via Stack Overflow by cheyrico2
, 1 year ago
via Stack Overflow by M. Cherbex
, 1 year ago
via GitHub by ex00
, 1 year ago
This exception has no message.
java.lang.NullPointerException at java.io.Reader.<init>(Reader.java:78) at java.io.InputStreamReader.<init>(InputStreamReader.java:72) at java.util.Scanner.<init>(Scanner.java:608) at apluscomputerscience.two.main(two.java:23) at apluscomputerscience.APlusComputerScience.main(APlusComputerScience.java:21)