Adding rows to Jtable

[Anand Shrivastava]

Dear friends,

I have a JTable with DefaultTableModel like this

 DefaultTableModel tbm = new DefaultTableModel();
Vector <vector> row = new Vector<vector>();
Vector <String> column = new Vector<String>();
column.addElement("Sno");
column.addElement("Item Name");
tbm.setDataVector(row,column);
JTable jTable1 = new JTable(tbm);
 
This creates a table with two columns and no rows.
Now at runtime when I want to add rows I create a row vector like this
 
Vector <String> r = new Vector<String>();
r.addElement(rset.getString("1"));
 
and when I add it to row vector like this :
row.addElement(r);
   

it does not reflect in the table.

Kindly help.

[Brian Cole]

If you call tbm.fireTableRowsInserted(0, 0) then the table will be notified that the model has changed. The model can't fire the event itself because you have modified its Vectors behind its back.

Simpler would be to use the model's methods instead: tbm.addRow() or tbm.insertRow(). [also: tbm.addColumn()] Not only will these fire events for you automatically but I think they do some error-checking, which could be handy if you are adding a row of length 1 to a 2-column table model.

[edit: changed tbm.fireTableRowsInserted(1, 1) to tbm.fireTableRowsInserted(0, 0), see below]
[ October 09, 2007: Message edited by: Brian Cole ]

[Anand Shrivastava]

I tried to call these methods by saying

jtb.getModel().addRow();

but it says cannot find symbol addRow();

[Anand Shrivastava]

sorry the variable is not jtb in this case. I mean

jTable1.getModel().addRow();

It says cannot find symbol addRow()

[Anand Shrivastava]

and even after saying tbm.fireTableRowsInserted(1,1); the change is not being reflected.

[Anand Shrivastava]

and even if i do like tbm.addRow(row);
still the change is not reflected in the table.

[Brian Cole]

Originally posted by Anand Shrivastava:
and even after saying tbm.fireTableRowsInserted(1,1); the change is not being reflected.

Oops, it should actually be tbm.fireTableRowsInserted(0, 0).

That will work, but you'll still get an ArrayIndexOutOfBoundsException because you're adding a row of length 1 to a two-column table model.

and even if i do like tbm.addRow(row);
still the change is not reflected in the table.

You named the Vector for the row you're adding r, so did you try tbm.addRow(r)? If so it would have worked (and with no ArrayIndexOutOfBoundsException).


Either of those two things will make it work, but easiest to rewrite it using the DefaultTableModel methods I mentioned:

DefaultTableModel tbm = new DefaultTableModel();
//Vector <Vector> row = new Vector<Vector>();
//Vector <String> column = new Vector<String>();
tbm.addColumn("Sno"); //column.addElement("Sno");
tbm.addColumn("Item Name"); //column.addElement("Item Name");
//tbm.setDataVector(row,column);
JTable jTable1 = new JTable(tbm);
 
//This creates a table with two columns and no rows.
//Now at runtime when I want to add rows I create a row vector like this
 
Vector <String> r = new Vector<String>();
r.addElement(rset.getString("1"));
 
//and when I add it to row vector like this :
tbm.addRow(r); // row.addElement(r);

[Anand Shrivastava]

Thanks a lot,

It worked.

[Archana Honnavalli]

...

[Maneesh Godbole]

Archana,
I am sorry but I had to edit your post. What you had done is called hijacking a post.
http://faq.javaranch.com/java/UseOneThreadPerQuestion

Please start a new thread for your question.

[Archana Honnavalli]

Maneesh Godbole wrote:Archana,
I am sorry but I had to edit your post. What you had done is called hijacking a post.
http://faq.javaranch.com/java/UseOneThreadPerQuestion

Please start a new thread for your question.

Ok i realize that.......
I have started a new thread for my question.
But the reason i posted there was that my doubt was related to the posts.
Anyway thanks for info

Archana

[Maneesh Godbole]

Archana Honnavalli wrote:
But the reason i posted there was that my doubt was related to the posts.

In such cases, you can always provide a link to the relevant topic in your post.

[Vineet kumar Gupta]

But how to display this table on a button click....
I mean I am not getting the table on button click...

[Darryl Burke]

What didn't you understand in Maneesh's post about using one thread per question? Your question isn't even related to the question asked in this thread. Please start a new thread.

Also, please check your private messages for an important administrative matter.