CODEWITHSUNDEEP
javaswing
Saiyine
Saiyine

Reputation: 1585

Adding rows to a JTable

We have a simple project where we read data from a socket and we want to populate a table with the coming data, but we can't find a way to add rows to a yet created JTable object, we can only find how to add rows at creation time of the table.

Is it possible to add rows dynamically to a JTable, or there is a better alternative object to deal with this way of showing data?

EDIT: Thanks a lot for your answers.

All three of them look very promising, but I have to choose only one and I think the best is Guillaume's.

Upvotes: 14

Views: 32191

Answers (3)

Peter
Peter

Reputation: 5798

If you use the default table model for a JTable then you can add rows with following code

 if ( dest+1 < table.getRowCount()-1 )
    ( (DefaultTableModel) table.getModel() ).insertRow(dest+1, getValuesForNewRow());
  else
    ( (DefaultTableModel) table.getModel() ).addRow(getValuesForNewRow());

Upvotes: 11

Guillaume
Guillaume

Reputation: 18875

You should create a custom TableModel. A JTable doesn't actually store the rows, it always delegates that to a TableModel. To help you implementing it, you should make use of AbstractTableModel. Don't forget to call fireTableRowsInserted() every time you add rows. For better performances if you add a lot of rows, try to batch the updates and add many rows at a time.

Upvotes: 12

Paul Tomblin
Paul Tomblin

Reputation: 182850

Once you start dynamically adding and removing elements from a JTable, you really need to start using a TableModel.

See the Java Tutorial for more details.

Upvotes: 6

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