Selected columns

[Pat Peg]

How can I determine which column was selected in a JTable. Please, if you could give me an example without using an inner class that would be great. I've tried using
addMouseListener(this);
and then just overwriting mouseClicked but I don't know how to get a value back for the column.

Confussed...

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
 
public class ColumnSelection
{
    public ColumnSelection()
    {
        JTable table = getTable();
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        SelectionListener selectionListener = new SelectionListener(table);
        // for row selections
        table.getSelectionModel().addListSelectionListener(selectionListener);
        // for column selections
        TableColumnModel model = table.getColumnModel();
        model.getSelectionModel().addListSelectionListener(selectionListener);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(table));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    private JTable getTable()
    {
        int rows = 48, cols = 4;
        String[] headers = new String[cols];
        Object[][] data = new Object[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
            {
                if(row == 0)
                    headers[col] = "column " + (col + 1);
                data[row][col] = "item " + (row * cols + col + 1);
            }
        return new JTable(data, headers);
    }
 
    public static void main(String[] args)
    {
        new ColumnSelection();
    }
}
 
class SelectionListener implements ListSelectionListener
{
    JTable table;
 
    public SelectionListener(JTable table)
    {
        this.table = table;
    }
 
    public void valueChanged(ListSelectionEvent e)
    {
        if(!e.getValueIsAdjusting())
        {
            int row = table.getSelectedRow();
            int col = table.getSelectedColumn();
            System.out.println("row = " + row + "\tcol = " + col);
        }
    }
}