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    Thrown to indicate that a method has been passed an illegal or inappropriate argument. Check that you don't have more than one method existing with the same name.

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via Oracle Community by 807605, 4 months ago
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object is not an instance of declaring class *
via hivmr.com by Unknown author, 1 year ago
via Google Groups by moop™, 2 years ago
wrong number of arguments
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object is not an instance of declaring class
via Stack Overflow by Bebo
, 1 year ago
object is not an instance of declaring class
java.lang.IllegalArgumentException: object is not an instance of declaring class
*	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at undefined.Invoker1.main(Invoker1.java:31)