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how to read a csv file from our hard disk in java which has 1 0 rows and 3 cholumns, the columns are rownumber, question

how to read a csv file from our hard disk in java which has

10

rows and

3

cholumns, the columns are rownumber, question string, answer string and append it to the exsisting csv file on our local hard disk using jfilechooser in window builder

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