What are the best practices for creating custom exceptions in Java?

What are the best practices for creating custom exceptions in Java?

When creating custom exceptions in Java, it's important to extend from the Exception class or its subclasses. This ensures that your exceptions are checked exceptions, which can be caught and handled appropriately.

Should I include a message and a cause in my custom exception?

Yes, including a message and a cause is a good practice. The message provides context about the error, while the cause helps in understanding the underlying issue.

Is it necessary to create custom exceptions for every error?

Not necessarily. Use custom exceptions for specific error conditions that require unique handling. For general errors, standard exceptions may suffice.

Can you give an example of a custom exception?

Sure! Here's a simple example:

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