What are generics in Java and how do I use them?

What are generics in Java and why should I use them?

Generics in Java allow you to define classes, interfaces, and methods with a placeholder for types. They enhance type safety and code reusability.

Can you give me an example of how to use generics in a method?

Sure! Here's a simple example:

public <T> void printArray(T[] array) {
    for (T element : array) {
        System.out.println(element);
    }
}

This method can accept an array of any type.

What are the benefits of using generics over regular classes?

Generics provide stronger type checks at compile time, eliminate the need for casting, and allow for code that is more flexible and reusable.

Are there any downsides to using generics?

One downside is that generics can introduce complexity in your code. Additionally, due to type erasure, you can't create instances of type parameters.