What are Java Generics and why should I use them?

What are Java Generics and why should I use them?

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

Can you give me an example of how to use Generics in a class?

Sure! Here's a simple example:

public class Box<T> {
    private T item;
    public void setItem(T item) { this.item = item; }
    public T getItem() { return item; }
}

This class can hold any type of object.

What are the advantages of using Generics?

The main advantages include stronger type checks at compile time, elimination of casts, and the ability to implement generic algorithms.

Are there any downsides to using Generics?

One downside is that Generics can introduce complexity in code. Also, due to type erasure, you can't use primitive types directly.