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In this tutorial, we will learn how to read a CSV file in Java using the OpenCSV library. CSV files are commonly used to store data in a tabular format, and OpenCSV provides an easy-to-use interface for parsing these files.
In this example, we create a CSVReader object by passing a FileReader object to its constructor. We then read the file line by line using the readNext() method, which returns an array of strings representing the values in each column of the current row. We can process the data in the while loop by accessing the elements of the nextLine array.
It's important to note that the OpenCSV library handles CSV files with different separators, quotes, and escape characters automatically. This means that we don't need to worry about these details when reading our CSV file.
In conclusion, OpenCSV provides a simple and efficient way to read CSV files in Java. By following the example above, you should be able to read and process data from your own CSV files.
0:00 CSV files and Java
0:36 The Coma Separated Values file format
2:22 OpenCSV as a Maven dependency
2:50 The app that reads CSV in Java
3:37 CSVReader instantiation
4:04 ReaderBuilder, custom separator and escape character
4:43 How to read fields from CSV file
6:00 Run the code