What are Java Generics and how do they work?

What are Java Generics and how do they work?

Java Generics allow you to define classes, interfaces, and methods with a placeholder for types, enhancing code reusability.

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;
    }
}

How do I use this Box class?

You can create a Box for any type like this:

Box<String> stringBox = new Box<>();
stringBox.setItem("Hello");
String item = stringBox.getItem();

What are the benefits of using Generics?

Generics provide type safety, reduce code duplication, and eliminate the need for casting, making your code cleaner and safer.