Java Programming

I have a quick question on While loops and what structure may be best for this particular problem that I need to address. I am unsure as to what while loop structure I should use for this particular demand.

I am to develop a solution that will calculate the average and lowest temperature for the given set of temperatures. The number of temps may differ from time to time.

To write this program I am to use a While loop. This program should read the temp from the text file named input.txt, and output the results to the text file named result.txt.

Output example:
Original set: 79 60 78 90 78
Average temp: 77
Lowest temp: 60


I am not sure what While loop should be used to to determine the average of the temps and a bit unsure how I would implement the input and output txt files for this solution. I believe I would need to use Textpad for those files.

Thanks for the guidance, I truly appreciate the help.

Ryan