What is the throw keyword in Java?

What is the throw keyword in Java?

The throw keyword in Java is used to explicitly throw an exception from a method or block of code.

Can you give me an example of how to use it?

Sure! Here's a simple example:

public void checkAge(int age) {
    if (age < 18) {
        throw new IllegalArgumentException("Age must be 18 or older.");
    }
}

What happens if I don't catch the exception?

If you don't catch the exception, it will propagate up the call stack and may terminate the program if unhandled.

Are there any best practices for using throw?

Yes, it's best to throw exceptions that are meaningful and provide clear messages to help with debugging.