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Editorial Team
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Asked: 2026-06-01T15:39:40+00:00

If I invoke this method with different dates, the decimal places of the result

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If I invoke this method with different dates, the decimal places of the result of difference / 1000L / 60L / 60L / 24L will always be truncated. What can I do to prevent that? I need a result of 4.xx.

public boolean checkDelayed(Date date1, Date date2)
{
    long difference = date2.getTime() - date1.getTime();

    if (difference / 1000L / 60L / 60L / 24L <= 4L)
    {
        return true;
    }

    return false;
}
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1 Answer

  1. Editorial Team

    Try using doubles instead of Longs.

    public boolean checkDelayed(Date date1, Date date2)
{
    double difference = (double) (date2.getTime() - date1.getTime());

    if (difference / 1000d / 60d / 60d / 24d <= 4d)
    {
        return true;
    }

    return false;
}

    The best way would be to apply simple math. Your condition is this:

    difference / 1000L / 60L / 60L / 24L <= 4L

    Work out like this:

            difference / 60L / 60L / 24L <= 4000L
              difference / 60L / 24L <= 240000L
                    difference / 24L <= 14400000L
                          difference <= 345600000L

    There you have it. The always working simple condition.

    public boolean checkDelayed(Date date1, Date date2)
{
    long difference = date2.getTime() - date1.getTime();

    if (difference <= 345600000L)
    {
        return true;
    }

    return false;
}

    The reason for all of this is that the long datatype does not support decimal values. By converting to a double you will be able to keep the decimal values.

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