How Can I Add a Select All Checkbox to a JTable Header?

How can I integrate a control into a JTable's JTableHeader?

In a JTable with a Boolean-typed column, the default renderer is a JCheckBox. While individual cells are effortlessly selectable based on user interaction, it can prove advantageous to select or deselect all checkboxes with ease.

Addressing the Well-Behaved Issue

A well-behaved control in the JTableHeader should respond to mouse events, provide visual feedback, and align seamlessly with the header's appearance.

Solution: SelectAllHeader

The SelectAllHeader class extends JToggleButton and implements TableCellRenderer. It adds a check box to the table header and responds to mouse clicks within a specific column. The check box's state toggles between "Select all" and "Select none" based on the current state of all checkboxes in the corresponding column.

Implementation Details

The SelectAllHeader constructor takes the target table and column as parameters. It applies visual styles consistent with the table header, adds an ItemListener to toggle the check box state, and adds Mouse and TableModel listeners to handle mouse clicks and maintain synchronization with the model.

Usage

To integrate the SelectAllHeader, retrieve the desired column from the table's column model and set its header renderer to an instance of SelectAllHeader.

Advantages

This solution:

• Provides a convenient way to select all checkboxes in a column.
• Maintains synchronization with the model, updating the check box state when the underlying data changes.
• Adheres to the visual aesthetics of the table header, ensuring a cohesive appearance.

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