java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

A java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES) error typically indicates that the MySQL server is unable to authenticate the user with the provided username and password. This can be caused by a number of factors, including:

1. Incorrect username or password: Make sure that you are using the correct username and password for the MySQL server.

2. User account is not granted access to the database: If the user account does not have the necessary permissions to access the database, you will need to grant the appropriate privileges to the user.

3. User account is not active: If the user account has been disabled or expired, you will need to re-enable or reset the account.

4. MySQL server is not running: Make sure that the MySQL server is running and reachable from your Java application.

5. Incorrect MySQL server hostname or port: Make sure that you are using the correct hostname and port for the MySQL server in your Java application.

To troubleshoot this error, you will need to identify the cause of the problem and take the appropriate action to resolve it.

I hope this helps! Let me know if you have any questions.