Java SE (Java Platform, Standard Edition)

hi all,

i want to know why the setWidth is not working in the following code,

try to uncomment the code in columnMarginChanged method and run it wont resize the table.
i cont set width(using setWidth) of the other table column using getWidth of the main table column.

and i want to resize the right side columns only (you can check when you resize the any column the left and right side columns also resizing)

any suggestions could be helpful.

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.TableColumnModelEvent;
import javax.swing.event.TableColumnModelListener;
import javax.swing.table.TableColumnModel;

public class SynTableResize extends JFrame implements TableColumnModelListener, ActionListener
{

    JTable  table1       = new JTable(5, 5);
    JTable  table2       = new JTable(5, 5);
    JTable  table3       = new JTable(5, 5);
    JButton btn          = new JButton("refresh");

    JPanel  pnlcontainer = new JPanel();

    public SynTableResize()
    {

        setLayout(new BorderLayout());
        
        pnlcontainer.setLayout(new BoxLayout(pnlcontainer, BoxLayout.Y_AXIS));
        pnlcontainer.add(table1.getTableHeader());
        pnlcontainer.add(Box.createVerticalStrut(5));
        pnlcontainer.add(table2);
        pnlcontainer.add(Box.createVerticalStrut(5));
        pnlcontainer.add(table3);

        table2.setTableHeader(null);
        table3.setTableHeader(null);

        table1.getColumnModel().addColumnModelListener(this);

        table3.setColumnModel(table1.getColumnModel());
        table2.setColumnModel(table1.getColumnModel());

        table2.getColumnModel().addColumnModelListener(table1);
        table3.getColumnModel().addColumnModelListener(table1);

        btn.addActionListener(this);

        getContentPane().add(pnlcontainer, BorderLayout.CENTER);
        getContentPane().add(btn, BorderLayout.SOUTH);

        setSize(new Dimension(400, 400));
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    public static void main(String[] args)
    {
        new SynTableResize();
    }

    public void columnAdded(TableColumnModelEvent e)
    {

    }

    public void columnMarginChanged(ChangeEvent e)
    {
        TableColumnModel tcm = table1.getColumnModel();
        int columns = tcm.getColumnCount();

        for (int i = 0; i < columns; i++)
        {
            table2.getColumnModel().getColumn(i).setPreferredWidth(tcm.getColumn(i).getWidth());
            table3.getColumnModel().getColumn(i).setPreferredWidth(tcm.getColumn(i).getWidth());
            
            // the following commented code wont work.
//            table2.getColumnModel().getColumn(i).setPreferredWidth(tcm.getColumn(i).getPreferredWidth());
//            table3.getColumnModel().getColumn(i).setPreferredWidth(tcm.getColumn(i).getPreferredWidth());
//            
//            table2.getColumnModel().getColumn(i).setWidth(tcm.getColumn(i).getWidth());
//            table3.getColumnModel().getColumn(i).setWidth(tcm.getColumn(i).getWidth());
        }

        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                table2.revalidate();
                table3.revalidate();
            }
        });
    }

    public void columnMoved(TableColumnModelEvent e)
    {
    }

    public void columnRemoved(TableColumnModelEvent e)
    {
    }

    public void columnSelectionChanged(ListSelectionEvent e)
    {
    }

    public void actionPerformed(ActionEvent e)
    {
        JTable table = new JTable(5, 5);

        table.setColumnModel(table1.getColumnModel());
        table.getColumnModel().addColumnModelListener(table1);

        pnlcontainer.add(Box.createVerticalStrut(5));
        pnlcontainer.add(table);
        pnlcontainer.validate();
        pnlcontainer.repaint();
    }
}

thanks
dayananda b v