change JTable column name, gui does not update at once

**renars** · May 22nd, 2011, 01:35 PM

I use following code to change column name:

  public void ChangeName(JTable table, int col_index, String col_name){
    table.getColumnModel().getColumn(col_index).setHeaderValue(col_name);
  }

It actually works but in GUI it updates only when I click on column header.
where could be the problem?

**helloworld922** · May 22nd, 2011, 08:14 PM

Likely it's because you're not explicitly forcing a repaint.

**copeg** · May 22nd, 2011, 08:48 PM

You need to notify the model the the table structure has changed. Presuming the TableModel of your JTable extends AbstractTableModel, call fireTableStructureChanged() on the model

**renars** · May 23rd, 2011, 10:39 AM

thanks, copeg! your solution worked but it recreated all table from model which contained old data so I had to change approach. now I use model.setColumnIdentifiers(columnNames) each time I need to change columnNames and it works. thanks again.

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