This week's book giveaway is in the Programmer Certification forum. We're giving away four copies of OCP Oracle Certified Professional Java SE 21 Developer (Exam 1Z0-830) Java SE 17 Developer (Exam 1Z0-829) Programmer’s Guide and have Khalid Mughal and Vasily Strelnikov on-line! See this thread for details.
Don't use the JCheckBox explicitly, just make the TableModel indicate Boolean.class as the class for the respective column. The TableCellRenderer will take care of the rest, i.e. display a checkbox automatically.
In order to have the cell editable, the TableModel's isCellEditable() method has to return true for the column with the checkboxes. A change to the checkbox will then call back the TableModel's setValueAt() method, so you can write back the change into your backing data structures.