Difference between java.util.Date and java.sql.Date in Java or why does Java have java.sql.Date if there is already a Date class in java util package is a common java interview question. There is always confusion among many Java developers familiar with both java.util.Date and java.sql.Date. Though many of them already using java.sql.Date to interface with DATE type of any relational database like MySQL, Oracle, or any other database. In this Java tutorial, we will see some differences between java.sql.Date and java.util.Date will help to understand both of them better.