Wednesday, April 18, 2007

Explain the usage of java.util.Date and more classes and APIs for date handling in Java?

The class java.util.Date
-Represents a point in time.
-Corresponds to the number of milliseconds since the start of the Unix epoch on January 1, 1970, 00:00:00 GMT.
-This class depends on System.currentTimeMillis() to obtain the current point in time,which actually returns a long value and its accuracy and precision is determined by the implementation of System and underlying OS.
Apart from this class there are several other classes like GregorianCalendar,SimpleTimeZone,SimpleDateFormat,DateFormatSymbols,java.sql.Date,java.sql.Time ,java.sql.Timestamp which are used for handling date and time related problems.In the table shown below a very brief purposes of these classes have been summarized:


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