In general, the super keyword can be used to call overridden methods, access hidden fields or invoke a superclass's constructor. In fact, multiple inheritance is the only case where super() is of any use I would not recommend using it with classes using linear inheritance, where it's just useless overhead. I'm currently learning about class inheritance in my java course and i don't understand when to use the super() call I found this example of code where super.variable is used As for chaining super::super, as i mentionned in the question, i have still to find an interesting use to that
For now, i only see it as a hack, but it was worth mentioning, if only for the differences with java (where you can't chain super). Super e>) says that it's some type which is an ancestor (superclass) of e Extends e>) says that it's some type which is a subclass of e (in both cases e itself is okay.) so the constructor uses the Extends e form so it guarantees that when it fetches values from the collection, they will all be e or some subclass (i.e The automatic insertion of super () by the compiler allows this
I wrote the following code When i try to run it as at the end of the file i get this stacktrace 'super' object has no attribute do_something class parent The super keyword is not specific to android It's a concept belonging to oop, and represents the parent class of the class in which you use it In android, it's mostly usefull when you create your own activity or component, and lets you call a default behavior before implementing yours
For instance, the super methods must be called before anything when you override the activity onpause, on. Can't be called from main method
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