What are wildcards in Java and how do they work?
An example of an AI chatbot conversation about wildcards in Java programming.
What are wildcards in Java and how do they work?
Wildcards in Java are a way to specify a type that can be any type. They are often used in generics.
Can you give me an example of using wildcards in a method?
Sure! Here's an example: public static <T> void printList(List<? extends T> list) { ... } This method can accept a list of any type that extends T.
What is the difference between ? extends T and ? super T?
? extends T is used for reading data, while ? super T is used for writing data. They serve different purposes in generics.
Are there any limitations when using wildcards?
Yes, wildcards can limit the operations you can perform on the generic types, especially when it comes to adding elements.
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