Change Column names of AbstractTableModel

Question

Is it possible to change AbstractTableModel column names dynamically?

I am trying to implement setColumnName(0, "Speed rpm") method.

public class MyModel extends AbstractTableModel {

private String[] columnNames = {"Speed", "Pressure",
    "Force"};
public ArrayList<Values> list;

public MyModel() {

    list = new ArrayList<Values>();
}

public void setColumnName(int i, String name) {
    columnNames[i,name];
}
@Override
public int getRowCount() {
    return list.size();
}

@Override
public int getColumnCount() {
    return columnNames.length;
}

@Override
public Object getValueAt(int rowIndex, int columnIndex) {
    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}

}

+1 @nachokk, thanks. it worked. Could you answer it, so i can vote it as answer. — Vijay Vennapusa, Feb 21 '14 at 15:06

nachokk · Accepted Answer · 2014-02-21T16:13:30.407

3

Change

public void setColumnName(int i, String name) {
    columnNames[i,name];
}

to

public void setColumnName(int i, String name) {
    columnNames[i] = name;
    fireTableStructureChanged();
}

Following (always)good advices from @camickr

Invoking the fireTableStructureChanged() method will cause all custom renderers/editors to be lost. You can use the table.setAutoCreateColumnsFromModel(..) method when you create the table to prevent this from happening

edited Feb 21 '14 at 16:13

answered Feb 21 '14 at 15:04

nachokk

14,363
4
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AFAIK, a TableModelEvent will also have to be fired to notify the view that the header row has been changed. – JB Nizet Feb 21 '14 at 15:06
invoking the fireTableStructureChanged() method will cause all custom renderers/editors to be lost. – camickr Feb 21 '14 at 15:39
@camickr i see then `AbstractTableModel` doesn't provide any method to notfiy that only a column name change – nachokk Feb 21 '14 at 15:42
1

Yes, I was just providing a warning to the OP that by using that method the table is recreated which means the renderer/editors are lost and the table columns are reordered back to their original state and any sorting of the data in the table is lost. You can use the `table.setAutoCreateColumnsFromModel(..)` method when you create the table to prevent this from happening. – camickr Feb 21 '14 at 15:57
@camickr I didn't know that, thanks camickr i added to the answer! – nachokk Feb 21 '14 at 16:14

camickr · Answer 2 · 2014-02-21T15:51:52.133

2

Change the TableColumn:

tableColumn.setHeaderValue(...);
table.getTableHeader().repaint();

You can get the TableColumn by using:

table.getColumn(...); // or
table.getColumnModel().getColumn(...);

edited Feb 21 '14 at 15:51

answered Feb 21 '14 at 15:37

camickr

321,443
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+1 for alternative solution not using what op provide :) – nachokk Feb 21 '14 at 15:43

Change Column names of AbstractTableModel

2 Answers2