at compile time gives error.but i think that Object is a super class he takes all sub class object .
method set in class Manager cannot be applied to given types;
found: String reason: actual argument String cannot be converted to Object by method invocation conve
posted 3 years ago
The most likely explanation is you actually have your own Object class hanging around somewhere in the same package (either as source code or a compiled code). If you can't find it, try changing all the references to java.lang.Object and see if that changes the result.