java.lang.NullPointerException: This exception has no message.

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, 11 months ago
This exception has no message.
java.lang.NullPointerException:
at undefined.SlotMachine.isWinner(SlotMachine.java:41)
at undefined.Play1000SlotMachines.main(Play1000SlotMachines.java:14)
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:498)

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