How do I create a custom exception in Java?

How do I create a custom exception in Java?

To create a custom exception in Java, you need to extend the Exception class or one of its subclasses.

Can you show me a simple example?

Sure! Here's a basic example:

public class MyCustomException extends Exception {
    public MyCustomException(String message) {
        super(message);
    }
}

How do I throw this custom exception?

You can throw it using the throw keyword like this:

if (someCondition) {
    throw new MyCustomException("This is a custom error message.");
}

Can I catch this exception in a try-catch block?

Yes, you can catch it just like any other exception:

try {
    // code that may throw MyCustomException
} catch (MyCustomException e) {
    System.out.println(e.getMessage());
}