将Matlab串行时间戳转换为java.util.Date

Question

I have a matlab serial timestamp 735628.631944 and need to be converted it to java.util.Date 29.01.2014 15:10:00 .

it is very easy to convert in excel

string timestamp = serialTimestamp - 693960

select the timestamp in Excel can convert it to custom format (TT.MM.JJJ hh:mm:ss)

but how does it work internally? is there any formula for converting it in java ?

I get matlab serial timestamp from a CSV file and I am parsing it in Java. I require Java code for this conversion.

Answer 1

Matlab time is a number of days since 1/0/0000, but java.util.Date constructor expecs number of milliseconds since 1/1/1970, therefore

double timestamp = 735628.631944;
Date d = new Date((long)( (timestamp - 719529) * 86400000 ));

Here 719529 is a matlab timestamp for 1/1/1970 and 86400000 number of milliseconds in one day.