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date - OLEDate java implementation

I need a good OLEDate java implementation, and this one does not seem to be working. Is there any known good opensource implementations (like in apache commons)? If not, where do I read about it, so that I write my own implementation?

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Try this code:

public static Date getDateFromCOMDate(float comtime) {
    String floatstr = String.valueOf(comtime);
    String [] ss = floatstr.split("\.");
    long nulltime = -2209183200000L;
    long dayms = 86400000;
    int days = Integer.valueOf(ss[0]);
    float prop = comtime - days;
    long cdayms = Math.round(dayms * prop);
    long time = nulltime + days*dayms + cdayms;
    Date d = new Date(time);
    return d;
}

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