java - Classify huge CSV file by tag name -

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i have large size csv file 60mb. csv file contains object_name, timestamp, , value.

in csv file, there 10 objects listed in csv file based on time sequence, overlap. such :

a1,2013-08-24 15:36:47,24.83 a2,2013-08-24 15:36:47,26.56 a3,2013-08-24 15:36:47,25.83 a6,2013-08-24 15:36:47,-40 a8,2013-08-24 15:36:47,-40 a9,2013-08-24 15:36:47,-40 b2,2013-08-24 15:36:47,6 c1,2013-08-24 15:37:18,6

i want classfy records object_name. if size of file small, can it. in situation, spend 10 mins read csv file. not image classify data, crash laptop. expected results 10 list, each of them contain 1 object timestamp , value, such as,

object_name,timestamp,val a1,2013-08-24 15:00:00,26.7    .....    .....

could me? basically, want know effective way sorts these data object name , separates it.

btw, use opencsv read csv file.

thank you.


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