java - Multiple row selection in JTable

Question

I have a JTable, that has one column that is text which is not editable and the second column is a check box that displays boolean values.... Now what i want is, when the user selects multiple rows and unchecks any one of the selected check boxes, then all the check boxes under selection should get unchecked and vice versa.

Answer 1

Using @Hovercraft's example and @camickr's advice, the example below shows a suitable user interface. Although it uses buttons, the SelectionAction would also be suitable for a menu or popup.

import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.DefaultListSelectionModel;
import javax.swing.table.DefaultTableModel;

/** @see http://stackoverflow.com/questions/4526779 */
public class CheckABunch extends JPanel {

    private static final int CHECK_COL = 1;
    private static final Object[][] DATA = {
        {"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
        {"Three", Boolean.TRUE}, {"Four", Boolean.FALSE},
        {"Five", Boolean.TRUE}, {"Six", Boolean.FALSE},
        {"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE},
        {"Nine", Boolean.TRUE}, {"Ten", Boolean.FALSE}};
    private static final String[] COLUMNS = {"Number", "CheckBox"};
    private DataModel dataModel = new DataModel(DATA, COLUMNS);
    private JTable table = new JTable(dataModel);
    private DefaultListSelectionModel selectionModel;

    public CheckABunch() {
        super(new BorderLayout());
        this.add(new JScrollPane(table));
        this.add(new ControlPanel(), BorderLayout.SOUTH);
        table.setPreferredScrollableViewportSize(new Dimension(250, 175));
        selectionModel = (DefaultListSelectionModel) table.getSelectionModel();
    }

    private class DataModel extends DefaultTableModel {

        public DataModel(Object[][] data, Object[] columnNames) {
            super(data, columnNames);
        }

        @Override
        public Class<?> getColumnClass(int columnIndex) {
            if (columnIndex == CHECK_COL) {
                return getValueAt(0, CHECK_COL).getClass();
            }
            return super.getColumnClass(columnIndex);
        }

        @Override
        public boolean isCellEditable(int row, int column) {
            return column == CHECK_COL;
        }
    }

    private class ControlPanel extends JPanel {

        public ControlPanel() {
            this.add(new JLabel("Selection:"));
            this.add(new JButton(new SelectionAction("Clear", false)));
            this.add(new JButton(new SelectionAction("Check", true)));
        }
    }

    private class SelectionAction extends AbstractAction {

        boolean value;

        public SelectionAction(String name, boolean value) {
            super(name);
            this.value = value;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            for (int i = 0; i < dataModel.getRowCount(); i++) {
                if (selectionModel.isSelectedIndex(i)) {
                    dataModel.setValueAt(value, i, CHECK_COL);
                }
            }
        }
    }

    private static void createAndShowUI() {
        JFrame frame = new JFrame("CheckABunch");
        frame.add(new CheckABunch());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                createAndShowUI();
            }
        });
    }
}