JTable -Adding Column and Fix Columns Problems

[Anand Karia]

How do i add a Boolean Column in my existing table by clicking Edit Button.

How can i (fix/not editable) my column # 1 and column # 5. The rest must be editable.

ANAND.

[guy madura]

Hi ,
Your question is not clear.

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
import javax.swing.table.*;
 
public class AddingAColumn
{
    int rows, cols;
 
    public AddingAColumn()
    {
        cols = 4;
        rows = 8;
        final TableSupport support = new TableSupport();
        String[] headers = support.getHeaders(cols);
        String[][] data = support.getData(rows, cols);
        final CustomModel model = new CustomModel(data, headers);
        final JTable table = new JTable(model);
        table.setAutoCreateColumnsFromModel(false);
        JButton add = new JButton("add column");
        add.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                String s = "column " + cols++;
                Object[] data = support.getDataForNewColumn(rows);
                support.addColumn(table, s, data);
            }
        });
        JPanel north = new JPanel();
        north.add(add);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(north, "North");
        f.getContentPane().add(new JScrollPane(table));
        f.setSize(500,300);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    public static void main(String[] args)
    {
        new AddingAColumn();
    }
}
 
class TableSupport
{
    Random seed;
 
    public TableSupport()
    {
        seed = new Random();
    }
 
    public void addColumn(JTable table, Object header, Object[] data)
    {
        CustomModel model = (CustomModel)table.getModel();
        TableColumn col = new TableColumn(model.getColumnCount());
        col.setHeaderValue(header);
        table.addColumn(col);
        model.addColumn(header.toString(), data);
    }
 
    public Boolean[] getDataForNewColumn(int rows)
    {
        Boolean[] s = new Boolean[rows];
        for(int j = 0; j < rows; j++)
            s[j] = Boolean.FALSE;
        return s;
    }
 
    public String[] getHeaders(int cols)
    {
        String[] headers = new String[cols];
        for(int j = 0; j < cols; j++)
            headers[j] = "column " + (j + 1);
        return headers;
    }
 
    public String[][] getData(int rows, int cols)
    {
        String[][] data = new String[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
                data[row][col] = "item " + seed.nextInt(401);
        return data;
    }
}
 
class CustomModel extends DefaultTableModel
{
    String[] headers;
    Object[][] data;
    int[] noEditColIndices;
 
    public CustomModel(String[][] data, String[] headers)
    {
        super(data, headers);
        this.data = data;
        this.headers = headers;
        // no edit in first and third columns
        noEditColIndices = new int[] { 0, 2 };
    }
 
    public Class getColumnClass(int col)
    {
        return getValueAt(0, col).getClass();
    }
 
    public boolean isCellEditable(int row, int col)
    {
        for(int j = 0; j < noEditColIndices.length; j++)
            if(col == noEditColIndices[j])
                return false;
        return true;
    }
}