How to Enable Multiple Row Checkbox Selection and Control in a JTable?

Multiple Row Selection with Checkbox Control in JTable

In a JTable, users often require the ability to select multiple rows and perform actions on those selected rows. One common scenario is the need to toggle checkboxes in multiple selected rows simultaneously. This article demonstrates a solution to this problem by utilizing the JTable's selection model and event handling.

A JTable consists of two primary data structures: the data model (e.g., DefaultTableModel) and the selection model (e.g., ListSelectionModel). The selection model manages the selected rows and provides information about the selection state. By customizing the selection model, we can implement the desired behavior of checkbox control across multiple rows.

In this example, the DataModel class extends the DefaultTableModel to allow for checkbox editing in the second column. The getColumnClass() method is overridden to indicate that the second column contains Boolean values, enabling checkbox controls.

The ControlPanel class provides buttons for checking and clearing all selected checkboxes. When a button is clicked, the SelectionAction class is triggered. The actionPerformed() method of SelectionAction iterates over the selected rows and updates the checkbox values according to the button's value.

By combining these components, we achieve the desired functionality where multiple rows can be selected and the checkboxes in those rows can be toggled simultaneously. This provides greater control and efficiency for users interacting with large datasets.

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