Add a new column with checkbox for a jTable created with vectors

Question

I have a JTable which is created using 2 vectors for header and data. The JTable is being created with the data. Now I want to add a new column at the end of the table to select some specific rows.

            //set header
        Vector header = new Vector();
        for(int i=1; i<=rsmd.getColumnCount(); i++) {
            header.addElement(rsmd.getColumnLabel(i));
        }
            header.addElement("Select");

        //set data
        Vector data = new Vector();
        while(rs.next()) {
            Vector row = new Vector();
            for(int i=1; i<=rsmd.getColumnCount(); i++) {                      
                row.addElement(rs.getObject(i));
            }
            row.addElement(false);
            data.addElement(row);
        }

        DefaultTableModel dtm = new DefaultTableModel(data, header);
        tbl.setModel(dtm);

This is my code for creating the table. I have added a new column called Select. Just want to fill the column with checkboxes to select one or more rows.

Answer 1

The easiest way to override getColumnClass(int col) method of TableModel like next:

    DefaultTableModel dtm = new DefaultTableModel(data, header){
        @Override
        public Class<?> getColumnClass(int col) {
            if(col == CHECK_BOX_COLUMN_INDEX){
                return Boolean.class;
            }
            return super.getColumnClass(col);
        }
    };

where CHECK_BOX_COLUMN_INDEX - index of column with JCheckBox .

Also read Concepts: Editors and Renderers