I was taking tutorial on filtering data on table view JAVAFX and saw that line its a listener and want to know what is the work of that "?" at that place?
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Sorry i m new to javafx and i dont have that deep knowledge to search like you do , – user55924 Mar 01 '17 at 19:16
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i just saw ? and search it over but i did't get any answer. – user55924 Mar 01 '17 at 19:17
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so i decided to ask a question. – user55924 Mar 01 '17 at 19:17
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1Not a problem - it has just been answered before. Informally, `Change extends T>` means "Change of some unknown type, where the unknown type is `T` or a subclass of `T`." – James_D Mar 01 '17 at 19:49