Extending AbstractTableModel not updating cell contents in JTable

Question

Can someone show me why my JTable is not updating with my model below? It comes up fine the first time but when I enter new data being held in the arrays int nh, string hNam, int vh, string proc_1 , string proc_2, the table won´t update with the new data.

public class TableModel extends AbstractTableModel {

    int numRows;
    String columnNames[] = {"NH", "Horse Names", "VH",
        "Proc. I", "Proc. II"};
    Object[][] myData;

    TableModel() {
        super();
        numRows = fnh;
        myData = new Object[fnh][5];

        for (int i = 0; i < fnh; i++) {
            for (int j = 0; j < 5; j++) {
                if (j == 0) {
                    myData[i][0] = (Integer) nh[i];
                } else if (j == 1) {
                    myData[i][1] = (String) hNam[i];
                } else if (j == 2) {
                    myData[i][2] = (Integer) vh[i];
                } else if (j == 3) {
                    myData[i][3] = (String) proc_1[i];
                } else {
                    myData[i][4] = (String) proc_2[i];
                }
            }
        }
    }

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

    @Override
    public int getRowCount() {
        return myData.length;
    }

    @Override
    public String getColumnName(int col) {
        return columnNames[col];
    }

    @Override
    public boolean isCellEditable(int row, int col) {
        return true;
    }

    @Override
    public Object getValueAt(int row, int col) {

        if (col == 0) {
            return nh[row];
        } else if (col == 1) {
            return hNam[row];
        } else if (col == 2) {
            return vh[row];
        } else if (col == 3) {
            return proc_1[row];
        } else {
            return proc_2[row];
        }
    }

    @Override
    public void setValueAt(Object value, int row, int col) {
        myData[row][col] = value;
        fireTableCellUpdated(row, col);
    }
}

I don't see your implementation of `getColumnClass()`. Please edit your question to include an [sscce](http://sscce.org/) that exhibits the problem you describe. — trashgod, Apr 01 '13 at 05:39

score 1 · Answer 1 · answered Apr 01 '13 at 06:48

If you are updating a row in JTable and use setValueAt explicitly instead of just changing the value in data. And if you are adding new data to JTable then create a method in TableModel And recreate new data array with size 1 more than existing one fill it up with old data and then add new data to it. And then fire fireTableRowsInserted(int firstRow, int lastRow)

Extending AbstractTableModel not updating cell contents in JTable

1 Answers1