The Java EE 6 Tutorial, Volume I

Temporal Types in the order Application

The Order.lastUpdate persistent property, which is of type java.util.Date, is mapped to the PERSISTENCE_ORDER_ORDER.LASTUPDATE database field, which is of the SQL type TIMESTAMP. To ensure the proper mapping between these types, you must use the @Temporal annotation with the proper temporal type specified in @Temporal’s element. @Temporal’s elements are of type javax.persistence.TemporalType. The possible values are:

Here is the relevant section of Order:

public Date getLastUpdate() {
    return lastUpdate;