CODEWITHSUNDEEP
javaswingjtable
Pawan
Pawan

Reputation: 32321

DefaultTableModel setValueAt throwing ArrayIndexOutOfboundsException

My requirement is to show StockQuote Symbols (Streaming Data ) in a Grid . For this I have chosen JTable.

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;

public class Preethi {

    protected void initUI() {
        final Random random = new Random();

        final DefaultTableModel model = new DefaultTableModel(new String[] { "Id", "Name", "Desg", "Sal" }, 0);
        final JTable table = new JTable(model);
        table.setFillsViewportHeight(true);
        JFrame frame = new JFrame(Preethi.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JScrollPane scrollpane = new JScrollPane(table);
        frame.add(scrollpane, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);

        Random ran = new Random(12);
        ran.nextFloat();

        String str = new String("sss");

        String[] socrates = {str, str, str };
        model.addRow(socrates);

        System.out.println(model.getRowCount());
        System.out.println(model.getColumnCount());

        model.setValueAt(new Object[]{"ewqeq","rtgre","gfdgd","mbmnb"}, 1, 4);
    }

    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
            UnsupportedLookAndFeelException {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Preethi().initUI();
            }
        });
    }
}

Upvotes: 0

Views: 1499

Answers (2)

Amarnath
Amarnath

Reputation: 8865

model.setValueAt(new Object[]{"ewqeq","rtgre","gfdgd","mbmnb"}, 1, 4);

Row one does not exist so you will get ArrayIndexOutOfBoundsException. So as suggested by MadProgrammer use addRow(..) method and pass your object to that.

Example:

model.addRow(new Object[]{"ewqeq","rtgre","gfdgd","mbmnb"});

UPDATE:

You have defined only 4 columns so index will be from 0 to 3. But you have given 4 in setValueAt method. So you the problem remains same. Change it to 3.

Upvotes: 1

MadProgrammer
MadProgrammer

Reputation: 347204

You can't set the value of a row that doesn't exist.

DefaultTableModel has a addRow

As mentioned by Jon, you shouldn't be using static methods and fields for your data objects

Upvotes: 1

Related Questions