Yo, why is it that when it comes to generics in Lists, the naming convention is List<E> instead of List<T>
Question
Yo, why is it that when it comes to generics in Lists, the naming convention is List<E>
instead of List<T>
?
Solution
Sure, I can explain that. The naming convention for generics in Java, such as List<E>, is just a convention. The letter 'E' is used because it stands for "Element" which makes sense in the context of collections where we are often dealing with single elements at a time.
However, you could use almost any letter you like. 'T' is also commonly used and it stands for "Type". So List<T> is also correct and you might see it used in some code. The important thing is that the same letter is used consistently within a given method or class.
Here's a step by step breakdown:
- In Java, when defining a generic class or method, we use angle brackets (< and >).
- Inside these brackets, we put a single uppercase letter. This letter is a placeholder for whatever type we will use the class or method with.
- The convention is to use 'E' for collections (like List<E>) because 'E' stands for "Element".
- However, 'T' (for "Type") is also commonly used. Other letters like 'K' for Key, 'V' for Value, 'N' for Number can also be used.
- The important thing is to be consistent. If you start with 'E', don't switch to 'T' halfway through your code.
I hope this helps! Let me know if you have any other questions.
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