Question

Is there a function in Jave to calculate the mean ?

I’ve tried by myself but I’m afraid that sum has too high value: 5 642 782 840

Can a integer be 5 642 782 840 in Java ? I don’t think so…

for (int i = 0; i < timeValues.length; i++) {               
    sum = sum + Integer.parseInt(timeValues[i]);
}
   time = Integer.toString(sum / timeValues.length);    

thanks

Answer 1

Integer can hold values between -2.147.483.648 and 2.147.483.647.
Long can hold values between -9.223.372.036.854.775.808 and 9.223.372.036.854.775.807.

Thus a long would be suitable for your use case.

Another solution to do it without libraries would be to use java.math.BigInteger for your calculations. It supports even bigger numbers. At least if you don’t use floating point values like float or double. Of what type are your values in the timeValues array?

If you want to use a library you may want to have a look at Apache Commons Math. To be more precise: have a look at DescriptiveStatistics and SummaryStatistics.