Tagged Questions

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Why are wrapper classes not suited for use in callback frameworks?

I just read the question what are callback frameworks?, where the asker cites the following from Effective Java: The disadvantages of wrapper classes are few. One caveat is that wrapper classes ...
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event source calls methods in a interface

I am using Java. How does an event source like a (button in a GUI) knows which method to call in an interface? For example, I am listening to Mouse Events and have implemented a Mouse Listener ...