How do I use generics with collections in Java?

How do I use generics with collections in Java?

Generics allow you to define classes, interfaces, and methods with a placeholder for types. In collections, they help ensure type safety.

Can you give me an example of a generic list?

Sure! Here's a simple example: List<String> stringList = new ArrayList<>(); This creates a list that can only hold String objects.

What happens if I try to add an integer to that list?

If you try to add an integer to a List<String>, you'll get a compile-time error, which helps prevent type mismatches.

How do I create a generic method?

You can create a generic method by adding a type parameter before the return type. For example: public <T> void printArray(T[] array) { ... }.

Are there any limitations to using generics?

Yes, generics have some limitations, such as not being able to create instances of type parameters or use primitive types directly.