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Thread: change JTable column name, gui does not update at once

  1. #1
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    Question change JTable column name, gui does not update at once

    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?
    Last edited by helloworld922; May 22nd, 2011 at 08:14 PM.


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: change JTable column name, gui does not update at once

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

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    Administrator copeg's Avatar
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    Default Re: change JTable column name, gui does not update at once

    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

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    Default Re: change JTable column name, gui does not update at once

    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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