handling Throw exception in Groovy

In Groovy, you can throw exceptions using the throw keyword followed by an instance of a compatible exception class.

Here's an example of throwing an exception in Groovy:

try {
    def x = 10 / 0
} catch (ArithmeticException e) {
    throw new CustomException("Division by zero is not allowed", e)
}

In this example, we're trying to divide 10 by zero, which will raise an ArithmeticException. We catch this exception, and then throw a custom exception called CustomException with a message string and the original ArithmeticException passed in as the cause.

You can also throw exceptions in Groovy without a try-catch block like this:

def validateNumber(int input) {
    if (input < 0) {
        throw new IllegalArgumentException("Number must be positive")
    }
    return input * 2
}

In this example, we're defining a validateNumber function that checks if the input parameter is a positive number. If it's not, we throw an IllegalArgumentException with a message string.

handling Throw exception in Groovy

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