Is there a simple solution to adding columns & editable rows dynamically to a table model in Java?

Question

I've been searching for a few hours now and have been unable to find any neat & clean solution to adding a column/element dynamically to a table model in Java. Perhaps I'm a bad researcher, I don't know. It's been frustrating me, I've read through two different books and found absolutely nothing on the subject. I've pillaged Google's massive database and found nothing of use. I've found some 'solutions' to this for adding a row, but they don't seem so great. I want to be able to dynamically insert rows AND columns. I've invested 5 cups of tea & most of my mental stability into finding this solution, with no victory.

I was thinking of something like this:

rageTableModel.addColumn("No need to be upset anymore!");
rageTableModel.addRow("No need to be upset anymore!");

Maybe there is some increasingly simple solution to my struggles, however I seem to be unable to find it on my own. I'm rather new to Java(2-3 months experience), so it's not as if my knowledge spans that far on the subject. Any help would be appreciated.

EDIT: I see this "addColumn" method used everywhere, and I'm attempting to use it on the object of my AbstractTableModel; no victory. I don't see anything mentioning this method on the doc page. http://docs.oracle.com/javase/7/docs/api/javax/swing/table/AbstractTableModel.html

Do you have a code sample you can share? Are you writing your own TableModel, or are you using DefaultTableModel? — Aaron Kurtzhals
– Aaron Kurtzhals, Commented Aug 13, 2012 at 18:42
Oh, I was trying to use AbstractTableModel because the oracle tutorial seemed to recommend it. — dead beef
– dead beef, Commented Aug 13, 2012 at 18:44
use docs.oracle.com/javase/6/docs/api/javax/swing/table/…, it is absolutely OK, and has the methods you want :) — lbalazscs
– lbalazscs, Commented Aug 13, 2012 at 18:48
Alright. Thank you. I would delete this question to avoid the embarrassment, but I believe it will help out other people who run into the same problem as me. — dead beef
– dead beef, Commented Aug 13, 2012 at 18:51

Ashwinee K Jha · Accepted Answer · 2012-08-13 18:51:29Z

2

Following code works fine for me. If you have implemented your own table model may be it is not firing notifications properly.

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class TableTest {

    public static void main(String[] args) throws InterruptedException {
        JFrame f = new JFrame();

        DefaultTableModel m = new DefaultTableModel();
        JTable t = new JTable(m);

        f.add(new JScrollPane(t), BorderLayout.CENTER);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.pack();
        m.addColumn("A");
        m.addRow(new String[]{"A1"});

        Thread.sleep(1000);

        m.addColumn("B");
        m.addRow(new String[]{"A2", "B2"});     
    }
}

answered Aug 13, 2012 at 18:51

Ashwinee K Jha

9,3572 gold badges27 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

dead beef Over a year ago

Works fine, already found the solution due to other people helping out but this code sample will help out other people mislead by Oracle's tutorial on the subject.

MadProgrammer Over a year ago

How are Oracle's tutorials misleading?

Antonio de Mora · Accepted Answer · 2012-08-13 19:13:55Z

0

I don't know what you are trying to do but, I think always is better to set the model of the table. Only if you are writing a spread sheet or something like, you can write a button or context menu to add a new column or row. I mean, you should define the headers and call the method defaultTableModel.setColumnIdentifiers(Object[] newIdentifiers). Shure, the newIdentifiers object array is a String array. Doing so you only add Rows of data in order to show the data to the user.

Hope it helps!

answered Aug 13, 2012 at 19:13

Antonio de Mora

414 bronze badges

Collectives™ on Stack Overflow

Is there a simple solution to adding columns & editable rows dynamically to a table model in Java?

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related