License validation is a crucial process that involves both the verification and activation of a license key, ensuring that the software is used in accordance with its licensing agreements. The License class offers two specific methods for validation: License.getInstance().validate() and License.getInstance().validate(String licenseKey).

The first method, when executed without providing a license key as an argument, attempts to retrieve previously stored license data. This data may be sourced from a designated license file or the system registry, where it has been saved during prior interactions with the software. This approach is particularly useful for users who have already activated their licenses in the past and are looking to continue using the software without re-entering their license key.

On the other hand, the second method is designed for instances where the user provides a specific license key as an input. This method engages in a validation process to confirm the authenticity and validity of the supplied key. If the provided license key is verified successfully against the necessary criteria, the corresponding license data, which may include user information and licensing terms, is then saved securely either to the designated license file or the registry. This dual approach ensures that software licensing is both flexible for the user and secure from unauthorized access.