JTable & Combo Box

Question

Hello
I have 2 combo box in the Jtable. Whenever there is something selected in the first drop down i have to repopulate the second combo box.
JTable.populateData(ArrayList);
Column renderer /editor
TableColumn column1 = tablePane.getTable().getColumnModel().getColumn(
1);
columnn1.setCellEditor(new ComboBoxCellEditor(this));
column1.setCellRenderer(new ComboBoxCellRenderer(this));
TableColumn column2 = tablePane.getTable().getColumnModel().getColumn(
2);
column2.setCellEditor(new ComboBoxCellEditor(this));
column2.setCellRenderer(new ComboBoxCellRenderer(this));
How do i repopulate the data in 2nd combo box.

Answer 1

It sounds like the combobox can be different for every row based on the value in another column in the row, therefore you need to dynamically change the editor for each row. This can be done by overriding the getCellEditor() method:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableComboBoxByRow extends JFrame
    ArrayList editors = new ArrayList(3);
    public TableComboBoxByRow()
        // Create the editors to be used for each row
        String[] items1 = { "Red", "Blue", "Green" };
        JComboBox comboBox1 = new JComboBox( items1 );
        DefaultCellEditor dce1 = new DefaultCellEditor( comboBox1 );
        editors.add( dce1 );
        String[] items2 = { "Circle", "Square", "Triangle" };
        JComboBox comboBox2 = new JComboBox( items2 );
        DefaultCellEditor dce2 = new DefaultCellEditor( comboBox2 );
        editors.add( dce2 );
        String[] items3 = { "Apple", "Orange", "Banana" };
        JComboBox comboBox3 = new JComboBox( items3 );
        DefaultCellEditor dce3 = new DefaultCellEditor( comboBox3 );
        editors.add( dce3 );
        //  Create the table with default data
        Object[][] data =
             {"Color", "Red"},
             {"Shape", "Square"},
             {"Fruit", "Banana"},
             {"Plain", "Text"}
        String[] columnNames = {"Type","Value"};
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable(model)
            //  Determine editor to be used by row
            public TableCellEditor getCellEditor(int row, int column)
                if (column == 1 && row < 3)
                    return (TableCellEditor)editors.get(row);
                else
                    return super.getCellEditor(row, column);
        JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );
    public static void main(String[] args)
        TableComboBoxByRow frame = new TableComboBoxByRow();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible(true);
}