How do I use generics in Java?

How do I use generics in Java?

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

Can you give me an example of a generic 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;
    }
}

In this example, T is a type parameter that can be replaced with any object type.

What are the benefits of using generics?

The main benefits include type safety, code reusability, and eliminating the need for casting when retrieving items.

Are there any limitations to using generics?

Yes, some limitations include not being able to use primitive types as type parameters and type erasure at runtime.