I would like to know what is the difference between the objects java.util.Date and java.sql.Date , also if I am creating an application using Hibernate JPA which of these objects should I use to save my dates.
I must say that my application works well with both, as far as I have been able to prove, what I would like to know is if any of these objects has a feature that differentiates it from the other.
It's because of the information you get from each one:
java.util.Date = Represents an exact moment until the millisecond (2017 September 28 11:50:45)
java.sql.Date = Represents only one date (2017 September 28)
Generally you use java.sql.Date to form the PrepareStatement, since the BD would not accept the info provided by java.util.Date.
according to the javadocumentacion
java.sql.Date in a wrapper class that covers the milliseconds, which are used by the JDBC to identify a date type in SQL.
java.sql.Date represents a date without informing time / time while java.util.Date represents both date and time.
sql.Date is a class inheritance of util.Date.
both classes mutate (hence they are very bad)