can someone suggest me how to sort data..?

Hi everyone,
I have this time-output data like this in txt data type..

Code:

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time,output
0.6,20.0
1.0,40.0
0.8,20.0

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and i want to sort it out by every row in the next time data is the sum of all the previous time data,like this..

Code:

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0.6,20.0
1.6,40.0
2.4,20.0

---

i tried to use TreeMap by recklessly adding another column before the time column and sorting it with A to Z,hoping it will update with the natural order ABC but it doesnt work well. Can anyone suggest me something because i kinda use all of my ideas right now..

You are not doing any sorting, whatsoever. Use a simple arraylist and perform the "+" before adding to the list (either by "maintaining" the previous sum, or by first retreiving the last item in the list).

thanks for your idea. I solved it somehow :D