java.util.Date vs java.sql.Date

[Jack]

what is the difference between java.util.Date and java.sql.Date?
In which case do I have to use util.date and sql.date?
why these two things are provided in java?

[bbq]

Java.util.Date is a basic, all-purpose Date object. It simply stores a Date (as a long) and allows you to display it.

java.sql.Date extends java.util.Date to add the following functionality:

1) toString now outputs the date as "yyyy-mm-dd" instead of as a Locale specific String

2) add the valueOf method to read a String of "yyyy-mm-dd" format and parse it into a sql.Date object.