What are custom exceptions in Java and how do I create one?

What are custom exceptions in Java and how do I create one?

Custom exceptions in Java are user-defined exceptions that extend the Exception class. They allow you to create specific error handling for your application.

Can you show me an example of creating a custom exception?

Sure! Here's a simple example:

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

public class Test {
    public static void main(String[] args) {
        try {
            throw new MyCustomException("This is a custom exception!");
        } catch (MyCustomException e) {
            System.out.println(e.getMessage());
        }
    }
}

How do I handle this custom exception in my code?

You can handle it using a try-catch block, just like any other exception. Make sure to catch your custom exception specifically.

Are there any best practices for using custom exceptions?

Yes, it's best to use custom exceptions for specific error conditions, provide meaningful messages, and avoid overusing them.