What are the different return types in Java functions?

What are the different return types in Java functions?

In Java, functions can return various types, including primitive types like int, double, and boolean, as well as reference types like String and custom objects.

Can you give me an example of a function that returns a String?

Sure! Here's a simple example:

public String greet(String name) {
    return "Hello, " + name + "!";
}

What happens if a function doesn't return a value?

If a function doesn't return a value, it should be declared with the return type void. For example:

public void printMessage() {
    System.out.println("This function does not return a value.");
}

Are there any special return types in Java?

Yes, Java also has special return types like Optional<T> for handling cases where a value may or may not be present, and Stream<T> for returning a sequence of elements.