Can you explain generics in Java?

Can you explain generics in Java?

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

Why should I use generics instead of just using Object?

Using Object can lead to runtime errors due to type casting. Generics provide compile-time type checking, reducing the risk of ClassCastException.

Can you give me an example of a generic class?

Absolutely! 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 bounded type parameters?

Bounded type parameters restrict the types that can be used as arguments. For example, class Box<T extends Number> means T can only be a subclass of Number.