Adding Radio Buttons to Groups in a JTable

Problem Statement

An attempt to add radio buttons to a JTable using a renderer and editor resulted in the inability to achieve exclusivity. The code snippet provided demonstrates the issue.

Alternative Solution

As an alternative, consider using a JComboBox as an editor for mutually exclusive choices within a row. This is a more efficient approach for space management and user experience.

Code Example

// ...
// Import declarations
// ...

public class JRadioAsRendererEditor extends JPanel {

    // ...
    // Class variables and methods
    // ...

    private class StatusRenderer extends StatusPanel implements TableCellRenderer {

        // ...
        // Overridden methods
        // ...

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
            setStatus((Status) value);
            if (isSelected) {
                setBackground(table.getSelectionBackground());
            } else {
                setBackground(table.getBackground());
            }
            return this;
        }
    }
}

Additional Alternatives

1. Alternative Renderer and Editor

You can create your own custom renderer and editor classes to achieve the desired behavior. Here's an example:

public class RadioCellRenderer extends DefaultTableCellRenderer {

    private RadioButtonGroup group;

    public RadioCellRenderer(RadioButtonGroup group) {
        this.group = group;
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column) {
        JRadioButton button = (JRadioButton) value;
        button.setSelected(group.isSelected(button));
        return button;
    }
}

public class RadioCellEditor extends DefaultCellEditor {

    private RadioButtonGroup group;

    public RadioCellEditor(JRadioButtonCheckBox box, RadioButtonGroup group) {
        super(box);
        this.group = group;
    }

    @Override
    public Object getCellEditorValue() {
        return delegate.get();
    }

    @Override
    public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
        JRadioButton button = (JRadioButton) value;
        if (group.isClearable()) {
            group.clearSelection();
        }
        group.add(button);
        return button;
    }
}

2. DefaultTableCellRenderer and DefaultCellEditor

You can use the DefaultTableCellRenderer and DefaultCellEditor classes with a custom JRadioButton that handles exclusivity. Here's an example:

public class ExclusiveJRadioButton extends JRadioButton {

    private RadioButtonGroup group;

    public ExclusiveJRadioButton(RadioButtonGroup group) {
        this.group = group;
        addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                group.setSelected(ExclusiveJRadioButton.this, true);
            }
        });
    }

    @Override
    public void setSelected(boolean selected) {
        if (group.isSelected(this)) {
            return;
        }
        super.setSelected(selected);
    }
}