Read file, And append line to it.

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I'm loading ARFF file from file, which last line on it represent a customer. This is working ok.
This line contain comma separated data.
I would like to load the same file but WITHOUT the last line (just the attributes), and :
1. To get from user the variable from GUI that i built, using jCheckbox and jComboBox.
2. Append this line to the variable that holds the read file.

For example:
in the GUI I check the box for Eggs, Milk, Water and Cola, while I leave Pepsi, Bread unchecked. Also i choose rom jComboBox that i'm married and born on 1928.
I want to append to variable (Append in end) : 1928,Married,1,1,1,1,0,0

Since its very simple, And i'm struggling this, i think its simple quick code, therefore low budget.

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