DefaultListModel & JTable; how to sync the items in the DefaultListModel

[Peter Primrose]

I have a jtable with items in it

example
name date age

Peter 01-jan-43 62
Ron 03-nov-73 32

when double clicking the name( eg peter), a new window pops up contains all relevent info of the user.

I added a sorter and when sorting the table it comes in the correct-wanted order, however, when double clicking the item - the wrong window pops up.

I take it the DefaultListModel is not synchronized with the tables elements.
Q: how to correct the DefaultListModel once the table has been sorted so it will be in sync with the jtable.


thanks
peter

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
 
public class TableModelTest extends MouseAdapter
{
    JTable table;
    String[] colNames;
    Object[][] data;
 
    public void mousePressed(MouseEvent e)
    {
        if(e.getClickCount() == 2)
        {
            Point p = e.getPoint();
            int row = table.rowAtPoint(p);
            int viewCol = table.columnAtPoint(p);
            TableColumnModel colModel = table.getColumnModel();
            TableColumn col = colModel.getColumn(viewCol);
            int modelCol = col.getModelIndex();
            DefaultTableModel model = (DefaultTableModel)table.getModel();
            String value = (String)model.getValueAt(row, modelCol);
            JOptionPane.showMessageDialog(table, value);
        }
    }
 
    private void sortTable()
    {
        TableColumnModel model = table.getColumnModel();
        for(int j = 0; j < model.getColumnCount(); j++)
        {
            TableColumn col = model.getColumn(j);
            int modelIndex = col.getModelIndex();
            sortModelColumn(modelIndex);
        }
    }
 
    private void sortModelColumn(int col)
    {
        DefaultTableModel model = (DefaultTableModel)table.getModel();
        int rows = model.getRowCount();
        String[] colValues = new String[rows];
        for(int row = 0; row < rows; row++)
            colValues[row] = (String)model.getValueAt(row, col);
        Collections.sort(Arrays.asList(colValues));
        for(int row = 0; row < rows; row++)
            model.setValueAt(colValues[row], row, col);
    }
 
    private void resetTableModel()
    {
        DefaultTableModel model = (DefaultTableModel)table.getModel();
        model.setDataVector(data, colNames);
        model.fireTableDataChanged();
    }
 
    private JPanel getUIPanel()
    {
        final JButton
            sort    = new JButton("sort"),
            restore = new JButton("restore");
        ActionListener l = new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                JButton button = (JButton)e.getSource();
                if(button == sort)
                    sortTable();
                if(button == restore)
                    resetTableModel();
            }
        };
        sort.addActionListener(l);
        restore.addActionListener(l);
        JPanel panel = new JPanel();
        panel.add(sort);
        panel.add(restore);
        return panel;
    }
 
    private JTable getTable()
    {
        String alpha = "abcdefghijklmnopqrstuvwxyz";
        char[] chars = alpha.toCharArray();
        Random seed = new Random();
        int rows = 32, cols = 4, dataLength = 4;
        colNames = new String[] { "column 1", "column 2", "column 3", "column 4" };
        data = new Object[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
               data[row][col] = getData(seed, dataLength, chars);
        table = new JTable(new DefaultTableModel(data, colNames))
        {
            public boolean isCellEditable(int row, int col) { return false; }
        };
        table.setCellSelectionEnabled(true);
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.addMouseListener(this);
        return table;
    }
 
    private String getData(Random r, int len, char[] chars)
    {
        StringBuilder sb = new StringBuilder();
        for(int j = 0; j < len; j++)
           sb.append(chars[r.nextInt(chars.length)]);
        return sb.toString();
    }
 
    public static void main(String[] args)
    {
        TableModelTest test = new TableModelTest();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(test.getUIPanel(), "North");
        f.getContentPane().add(new JScrollPane(test.getTable()));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}