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This class extends AbstractTableModel. It has an ArrayList arr but I don't know how to use the fire methods.

 public void adiciona(Entidad e) {
    if(DEBUG)
            System.out.println( " tamaño: "+tamaño()+" columas: "+getColumnCount()+"" +        Arrays.deepToString(columnNames) ); //size 6

    arr.add(e);//adds
    if(DEBUG)
            System.out.println( " tamaño: "+tamaño()+" columas: "+getColumnCount()+"" +   Arrays.deepToString(columnNames) ); //size 7

    //setNumRows( getRowCount() - 1 );
    //System.out.println( "hola");

    fireTableStructureChanged();//BOOOOm EXEPTION NULL POINTER ARRAY
    fireTableDataChanged();
    System.out.println( "hola");
 }

i am checking the java source on how java has the default table model ... what would be the equivalent for 

 private void justifyRows(int from, int to) {
    arr.setSize(getRowCount());

    for (int i = from; i < to; i++) {
        if (dataVector.elementAt(i) == null) {
            dataVector.setElementAt(new Vector(), i);
        }
        ((Vector)dataVector.elementAt(i)).setSize(getColumnCount());
    }
}

in an ArrayList

corlaez
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  • Yes when you add you have to call fireRowsInserted , this will notify the view, that ssomething in the model has change, and then the view has to update – nachokk Aug 13 '14 at 23:27

1 Answers1

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It has an ArrayList

Then use a custom TableModel that supports an ArrayList containing any custom Object.

For example you could use the Row Table Model. It provides a custom TableModel that stores custom Objects in an ArrayList. You will need to implement the getValueAt() and setValueAt() methods as they related to your custom Object. The JButtonTableModel example shows you how this can be done.

camickr
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  • Thank you very much. Definetly now I also think that for the minor changes I am doing it is not worth to extend and create the AbstractTableModel. I just finished extending the `DefaultTableModel` with some helper methods (and overriding some others) to make the `ArrayList` to Vector changes but i will definetly use the `RowTableModel` next time – corlaez Aug 14 '14 at 20:46