How to read .CSV file and display data into table format by using Java Swing?

The CSV stands for Comma-Separated Values. It is a simple file format which is used to store tabular data in simple text form, such as a spreadsheet or database. The files in the CSV format can be imported to and exported from programs (Microsoft Office and Excel) which store data in tables. The CSV file used a delimiter to identify and separate different data token in a file. The CSV file format is used when we move tabular data between programs that natively operate on incompatible formats. There are following ways to read CSV file in Java. The default separator of a CSV file is a comma (,).

In this blog,we build a GUI application which read .csv file and display into table by using java swing.

Software And tools Used :

1. NetBeans

2. Java 14

3. CSV file

4. Java Swing Knowledge

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Vector;
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVRecord;

public class SwingTableExample {

    public static void main(String args[]) {
        JFrame frame = new JFrame("Java Swing Table");
        JLabel selected_file = new JLabel();
        frame.setSize(900, 900);
        JButton btn_selectfile = new JButton("Select File");
        btn_selectfile.setBounds(0, 0, 95, 30);
        selected_file.setBounds(0, 5, 100, 200);
        frame.add(btn_selectfile);
        JPanel panel = new JPanel();
        panel.setBounds(0, 0, 900, 900);
        JTable jTable1 = new JTable();
        JScrollPane sp = new JScrollPane(jTable1);
        frame.add(selected_file);
        panel.add(sp);
        frame.add(panel);

        btn_selectfile.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JFileChooser filechooser = new JFileChooser();

                int i = filechooser.showOpenDialog(null);
                if (i == JFileChooser.APPROVE_OPTION) {
                    File f = filechooser.getSelectedFile();
                    String filepath = f.getPath();
                    String fi = f.getName();
                    //Parsing CSV Data
                    System.out.print(filepath);
                    selected_file.setText(fi);
                    DefaultTableModel csv_data = new DefaultTableModel();

                    try {

                        int start = 0;
                        InputStreamReader inputStreamReader = new InputStreamReader(new FileInputStream(filepath));
                        org.apache.commons.csv.CSVParser csvParser = CSVFormat.DEFAULT.parse(inputStreamReader);
                        for (CSVRecord csvRecord : csvParser) {
                            if (start == 0) {
                                start = 1;
                                csv_data.addColumn(csvRecord.get(0));
                                csv_data.addColumn(csvRecord.get(1));
                                csv_data.addColumn(csvRecord.get(2));
                                csv_data.addColumn(csvRecord.get(3));
                            } else {
                                Vector row = new Vector();
                                row.add(csvRecord.get(0));
                                row.add(csvRecord.get(1));
                                row.add(csvRecord.get(2));
                                row.add(csvRecord.get(3));
                                csv_data.addRow(row);
                            }
                        }

                    } catch (Exception ex) {
                        System.out.println("Error in Parsing CSV File");
                    }

                    jTable1.setModel(csv_data);

                }
            }
        });
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

    }
}

OUTPUT :

1. Run project.

2. Select CSV file by clicking "Select File" button.

Thats all. thank you for reading.

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