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File I/O - How to play with files ?

 
Chris Mathews
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Posts: 46
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I am trying to read from a file and then write to a file.
The input file looks like following :
07200608240190200105,WA07MA44,K
07200608340190200105,WA07MA37,K
07200608240190200105,WA07MA34_P2, K
07200608240190200105,WA07MA34_P1,K
07200608440190200105,WA07MA32,K
07200608340190200105,WA07MA31,K
07200608640190200105,WA07MA30_P2,K
07200608240190200105,WA07MA30_P2,K
07200608540190200105,WA07MA28_P2,K
07200608840190200105,WA07MA28_P1,K
07200608240190200105,WA07MA20_P2,K
07200608240190200105,WA07MA20_P2,K
07200608340190200105,WA07MA18,K
The Output should be :
The total Number of records in the input file : < the total number of records > -- In our case it should be 13
The number of unique values in the first column : <The total no. of unique values in the first column> This case it should be 6
The number of unique values in the secind column :<The no. of unique values in the second column> This case it should be 11
I am cluseless about how to achieve this.Anybody please help me with the idea and/or code.
Thanks,
Chris.
 
Jim Yingst
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Please don't post the same query in multiple forums - it wastes the time of people who don't realize that a question has already been answered. Since there are already several responses to this in "Java in General - Intermediate", I'll close this thread.
 
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