Problem with updating JTable

[kwaspl]

I'm not sure why my JTable want update. A few people have similar problem but i still cant find solution.

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;

public class TableDemo extends JPanel {
    public TableDemo() {
        super(new GridLayout(1,0));
        JTable table = new JTable(new MyTableModel());
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
    }

    class MyTableModel extends AbstractTableModel {
        private String[] columnNames = {"First Name",
                                        "Last Name",
                                        "Sport",
                                        "# of Years",
                                        "Vegetarian"};
        private Object[][] data = {
            {"Mary", "Campione",
             "Snowboarding", new Integer(5), new Boolean(false)},
            {"Alison", "Huml",
             "Rowing", new Integer(3), new Boolean(true)},
            {"Kathy", "Walrath",
             "Knitting", new Integer(2), new Boolean(false)},
            {"Sharon", "Zakhour",
             "Speed reading", new Integer(20), new Boolean(true)},
            {"Philip", "Milne",
             "Pool", new Integer(10), new Boolean(false)},
        };

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

        public int getRowCount() {
            return data.length;
        }

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

        public Object getValueAt(int row, int col) {
            return data[row][col];
        }
        public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }
        public void setValueAt(Object value, int row, int col) {
            data[row][col] = value;
            fireTableCellUpdated(row, col);
        }
    }
    private static void createAndShowGUI() {
 
      JFrame frame = new JFrame("TableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        TableDemo newContentPane = new TableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        TableDemo xxx = new TableDemo();
        xxx.createAndShowGUI();
        TableDemo.MyTableModel xxx2 = xxx.new MyTableModel();
        xxx2.setValueAt(new Integer(0), 3, 3);
        Object nn = new Integer(21);
        nn = xxx2.getValueAt(2,2);
        System.out.println(nn);
        }
    
}

[Fubarable]

This here:

 TableDemo.MyTableModel xxx2 = xxx.new MyTableModel();
        xxx2.setValueAt(new Integer(0), 3, 3);
        Object nn = new Integer(21);
        nn = xxx2.getValueAt(2,2);
        System.out.println(nn);

creates a new MyTableModel object but has absolutely no effect on the TableModel object that is held by the displayed JTable, so you shouldn't be surprised that the displayed data doesn't change. I suggest that you use a table model that extends DefaultTableModel, not AbstractTableModel, and that you make updates to the table model object that is in fact held by the JTable.

[pbrockway2]

... too slow ;(