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ewterwytryu wrote:The Data class in java is a wrapper around a millisecond value that always represents a time in UTC (GMT). That millisecond value can then be displayed in many different formats, and the normal toString() on a date returns the milliseconds formatted into a string with timezone information. That timezone information is taken from the machine that is executing toString().
but its date become Mar 01, 2010 *21:00:00*, also three hour difference, may I know what happened? how do I prevent this happened?
Use a SimpleDateFormat if you want to create a string representation that represents another timezone (or format).
Nothing of this is related to Serialization, and it's all documented in the javadoc for Date.