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How to plot the graph(line) from a file in java?

I have a directory containing list of files.

Those files have some list of values as x and y ordered as line by line.

And my question is just I would like to read those files one by one and to plot line graphs based on those values. Could you please help me for that?

I've used JFreeChart in the past to do something similar. You can download it here .

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