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Access from class B to A with Listener

https://code.sololearn.com/c6AicfkMc7v2/?ref=app If a class like B in the example Code has implemented a Listener(e.g. MouseListener) and in class A is an Instance from B, how can I call a Method from A with the implementation of the Method in class B. The example Code makes it clearer what I mean. I have read about a callback function to do this. Are there more ways to do this or is that a general design failure from me?

10/9/2019 8:39:05 PM

Stefanoo

3 Answers

New Answer

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Why dont you just make void hello static and call A.hello() in the aListener method

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Do you want to change the implementation in B based on the listener?

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Lord HN cool idea but nope 😆 Let us say that the Listener is a MouseListener and the overriden method is mouseClicked or something similar. Now the Listener triggers and the method mouseClicked is called. And this method calls the method from A. I hope it's now more clear. 😅