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Reading data from a specific CSV file and displaying it in JTable

About this question: Reading data from a CSV file and displaying it in JTable

I tried to adapt the program of this question to fit my needs, but it makes mistakes. I want the program to display the file located at the root of my project (so I have to write File DataFile = new File("res.csv");) that is all. The problem is that it only displays 2 lines when 4 lines should be displayed.

Here is the code:

import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.*;
import javax.swing.border.EmptyBorder;
import java.io.*;
import javax.swing.table.*;

public class T1Data extends JPanel {
    private final JTable table;

    public T1Data() {
        super(new BorderLayout(3, 3));

        this.table = new JTable(new MyModel());
        this.table.setPreferredScrollableViewportSize(new Dimension(700, 70));
        this.table.setFillsViewportHeight(true);

        JPanel ButtonOpen = new JPanel(new FlowLayout(FlowLayout.CENTER));
        add(ButtonOpen, BorderLayout.SOUTH);

        // Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        // Add the scroll pane to this panel.
        add(scrollPane, BorderLayout.CENTER);

        // add a nice border
        setBorder(new EmptyBorder(5, 5, 5, 5));

        CSVFile Rd = new CSVFile();
        MyModel NewModel = new MyModel();
        this.table.setModel(NewModel);
        File DataFile = new File("res.csv");
        ArrayList<String[]> Rs2 = Rd.ReadCSVfile(DataFile);

        NewModel.AddCSVData(Rs2);
        System.out.println("Rows: " + NewModel.getRowCount());
        System.out.println("Cols: " + NewModel.getColumnCount());

    }

    // Method for reading CSV file
    public class CSVFile {
        private ArrayList<String[]> Rs = new ArrayList<>();
        private String[] OneRow;

        public ArrayList<String[]> ReadCSVfile(File DataFile) {
            try {
                BufferedReader brd = new BufferedReader(
                        new FileReader(DataFile));

                while (brd.readLine() != null) {
                    String st = brd.readLine();
                    OneRow = st.split(",|\\s|;");
                    Rs.add(OneRow);
                    System.out.println(Arrays.toString(OneRow));
                } // end of while
            } // end of try
            catch (Exception e) {
                String errmsg = e.getMessage();
                System.out.println("File not found:" + errmsg);
            } // end of Catch
            return Rs;
        }// end of ReadFile method
    }// end of CSVFile class

    private static void createAndShowGUI() {
        // Create and set up the window.
        JFrame frame = new JFrame("T1Data");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create and set up the content pane.
        T1Data newContentPane = new T1Data();
        frame.setContentPane(newContentPane);

        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    class MyModel extends AbstractTableModel {
        private String[] columnNames = { "1", "2", "3", "4", "5", "6", "7", "8" };
        private ArrayList<String[]> Data = new ArrayList<>();

        public void AddCSVData(ArrayList<String[]> DataIn) {
            this.Data = DataIn;
            this.fireTableDataChanged();
        }

        @Override
        public int getColumnCount() {
            return columnNames.length;// length;
        }

        @Override
        public int getRowCount() {
            return Data.size();
        }

        @Override
        public String getColumnName(int col) {
            return columnNames[col];
        }

        @Override
        public Object getValueAt(int row, int col) {
            return Data.get(row)[col];

        }
    }

    public static void main(String[] args) {
        // Schedule a job for the event-dispatching thread:
        // creating and showing this application GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

CSV file content: s. which seems to bother:

Valeur par défaut,07/04/2014,0.5,1,0,0,0
Valeur par défaut,07/04/2014,0.5,1,0,0,0
Valeur par défaut,07/04/2014,0.5,1,0,0,0
Valeur par défaut,07/04/2014,0.5,1,0,0,0
Valeur par défaut,07/04/2014,0.5,1,0,0,0
+4
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2 answers

readLine. while . , while.

: , :

package stackoverflow;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Arrays;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import javax.swing.table.AbstractTableModel;

public class T1Data extends JPanel {
    private final JTable table;

    public T1Data() {
        super(new BorderLayout(3, 3));
        this.table = new JTable(new MyModel());
        this.table.setPreferredScrollableViewportSize(new Dimension(700, 70));
        this.table.setFillsViewportHeight(true);
        JPanel ButtonOpen = new JPanel(new FlowLayout(FlowLayout.CENTER));
        add(ButtonOpen, BorderLayout.SOUTH);
        // Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);
        // Add the scroll pane to this panel.
        add(scrollPane, BorderLayout.CENTER);
        // add a nice border
        setBorder(new EmptyBorder(5, 5, 5, 5));
        CSVFile Rd = new CSVFile();
        MyModel NewModel = new MyModel();
        this.table.setModel(NewModel);
        File DataFile = new File("res.csv");
        ArrayList<String[]> Rs2 = Rd.ReadCSVfile(DataFile);
        NewModel.AddCSVData(Rs2);
        System.out.println("Rows: " + NewModel.getRowCount());
        System.out.println("Cols: " + NewModel.getColumnCount());
    }

    // Method for reading CSV file
    public class CSVFile {
        private final ArrayList<String[]> Rs = new ArrayList<String[]>();
        private String[] OneRow;

        public ArrayList<String[]> ReadCSVfile(File DataFile) {
            try {
                BufferedReader brd = new BufferedReader(new FileReader(DataFile));
                while (brd.ready()) {
                    String st = brd.readLine();
                    OneRow = st.split(",|\\s|;");
                    Rs.add(OneRow);
                    System.out.println(Arrays.toString(OneRow));
                } // end of while
            } // end of try
            catch (Exception e) {
                String errmsg = e.getMessage();
                System.out.println("File not found:" + errmsg);
            } // end of Catch
            return Rs;
        }// end of ReadFile method
    }// end of CSVFile class

    private static void createAndShowGUI() {
        // Create and set up the window.
        JFrame frame = new JFrame("T1Data");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // Create and set up the content pane.
        T1Data newContentPane = new T1Data();
        frame.setContentPane(newContentPane);
        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    class MyModel extends AbstractTableModel {
        private final String[] columnNames = { "1", "2", "3", "4", "5", "6", "7", "8" };
        private ArrayList<String[]> Data = new ArrayList<String[]>();

        public void AddCSVData(ArrayList<String[]> DataIn) {
            this.Data = DataIn;
            this.fireTableDataChanged();
        }

        @Override
        public int getColumnCount() {
            return columnNames.length;// length;
        }

        @Override
        public int getRowCount() {
            return Data.size();
        }

        @Override
        public String getColumnName(int col) {
            return columnNames[col];
        }

        @Override
        public Object getValueAt(int row, int col) {
            return Data.get(row)[col];
        }
    }

    public static void main(String[] args) {
        // Schedule a job for the event-dispatching thread:
        // creating and showing this application GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

:

: enter image description here

+3

while . , , , , . , ? :

String st = brd.readLine();
while (st != null) {
    <do something>
    st = brd.readLine();
}


while ((String st = brd.readLine()) != null) {
    <do stuff>
}

( )

, ( , , ..). -, ( https://codereview.stackexchange.com/), , .

0

Source: https://habr.com/ru/post/1535029/

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