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Demystifying the ‘super()’ Keyword in Object-Oriented Programming

An explanation of how ‘super()’ works in Python and Java,with insights into its use in constructors and inheritance.

By Alice Johnson | LOS ANGELES – 2025/06/17 23:12:42


The super() keyword is a fundamental concept in object-oriented programming (OOP), particularly when dealing with inheritance. It allows a subclass to access methods and properties from its parent class (also known as a superclass). While the core concept remains the same, the implementation and nuances of super() can differ between programming languages like Python and Java.

‘super()’ in Python

In Python, super() is primarily used to call methods from a parent class, especially within the context of multiple inheritance. It helps ensure that all parent classes are properly initialized. The super() function relies on the Method Resolution Order (MRO) to determine the order in which parent classes are searched for methods [[1]].

“MRO=[First, Second]. Now call to super in init defined in First will continue searching MRO and find init defined in Second…” [[1]]

‘super()’ in Java

in Java, super() serves two main purposes: calling the superclass constructor and referring to a member (method or variable) of the superclass [[2]]. When used as a constructor call (super()), it *must* be the first statement in the subclass’s constructor [[2]]. This ensures that the superclass is initialized before the subclass.

Crucial Considerations

while super() is powerful, it’s crucial to understand its specific behavior in each language. In Python, the MRO plays a notable role in how super() resolves method calls in multiple inheritance scenarios [[1]].In Java, the placement of super() as the first statement in a constructor is mandatory to ensure proper object initialization [[2]].

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