What is the difference between generics and templates in programming?

What is the difference between generics and templates in programming?

Generics and templates are both ways to create reusable code, but they differ in their implementation and usage. Generics are primarily used in languages like Java and C#, while templates are used in C++. Would you like to know more about how each one works?

Yes, can you explain how generics work in Java?

Sure! In Java, generics allow you to define classes, interfaces, and methods with a placeholder for types. For example, you can create a generic class like Box<T> that can hold any type of object. This helps with type safety and reduces the need for casting.

What about templates in C++?

In C++, templates allow you to create functions and classes that can operate with any data type. You define a template using the template keyword, and it can be instantiated with different types at compile time. This provides flexibility and code reusability.

Are there any performance differences between them?

Yes, there can be performance differences. Templates in C++ are resolved at compile time, which can lead to faster execution. Generics in Java use type erasure, which may introduce some overhead at runtime. However, the actual impact depends on the specific use case.