Demystifying super(): Python and Java Implementations
Table of Contents
A look at how super() works in Python with multiple inheritance and its use in Java constructors.
The Role of super() in Python
In python, the super() function is used to call methods from a parent class. This is especially useful in scenarios involving inheritance, especially multiple inheritance. super() allows you to avoid explicitly naming the parent class [2].
When dealing with multiple inheritance, super() shines by navigating the method resolution order (MRO) [1]. The MRO defines the order in which base classes are searched when executing a method.Calling super() ensures that the correct method in the inheritance hierarchy is called, even in complex scenarios.
“The point of super is not to avoid writng the parent…” [2]
How super() Works in Java
In Java, super() is primarily used within constructors to call the constructor of the parent class. If you don’t explicitly call a super constructor, Java will automatically invoke the no-argument super constructor [3]. However, using super() becomes essential when the parent constructor requires arguments.
Using super() in Java ensures that the parent class is properly initialized before the subclass adds its specific initialization logic.It promotes proper object construction and avoids potential issues related to uninitialized parent class members.
Frequently Asked Questions
- What is the primary purpose of
super()in Python? - The primary purpose is to call methods from a parent class, especially useful in multiple inheritance scenarios.
- When is
super()most useful in Java? - It’s most useful when a parent class constructor requires arguments, ensuring proper initialization.
- What is MRO in Python?
- MRO stands for method Resolution Order, which defines the order in which Python searches for a method in a class hierarchy.
