How do I sort by mutiple columns that are in ArrayList using some comparable class

How do I sort by mutiple columns that are in ArrayList using some comparable class

Iam reading a csv file with 20 columns (all string types) in ArrayList after splitting them. I need to find how can I sort muti columns (i.e. sort by column 1 than sort by column 2 within that and finally column3 within that)

Thanks

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