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I am now using Fileutils to access a file to retrieve lines of phone number.
But now I need to add phone number , delete phone number and edit phone number in the file. I do know how to do it with JMenu , but i keep wondering , do anyone create a library for this?
I would suggest you to go for DB .
FILE IO in such case is very ugly coding.
and then also if you want to do it.
to modify content you need to create other file read from older and modify it in memory and write it back to new file.