How to add JCheckBox in JTable

In this tutorial, we are going to see how to add JCheckBox in JTable. JTable is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. When a value is selected in a JTable, a TableModelEvent is generated, which is handled by implementing a TableModelListener interface. We can add or insert a checkbox in a JTable cell by implementing the method getColumnClass().

We need to redefine the method getColumnClass() to return Boolean.class for the appropriate column.
 
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Java Program to add JCheckBox in JTable:

import javax.swing.*;
import java.awt.*;
import javax.swing.table.DefaultTableModel;

public class CheckBoxInTable extends JFrame 
{
  public CheckBoxInTable() 
  {
    //Headers for JTable
    String[] columns = {"Id", "Name", "Address", "Available"};

    //data for JTable in a 2D table
    Object[][] data = {
      {1, "Thomas", "Alaska", true },
      {2, "Jean", "Arizona", true },
      {3, "Yohan", "California", false },
      {4, "Emily", "Florida", false }
    };

    DefaultTableModel model = new DefaultTableModel(data, columns);

    JTable table = new JTable(model) {
      public Class getColumnClass(int column) {
        //return Boolean.class
        return getValueAt(0, column).getClass(); 
      }
    };

    JScrollPane scrollPane = new JScrollPane(table);
    getContentPane().add(scrollPane);

    JLabel labelHead = new JLabel("List of employees");
    labelHead.setFont(new Font("Arial",Font.TRUETYPE_FONT,20));
    getContentPane().add(labelHead,BorderLayout.PAGE_START);
  }

  public static void main(String[] args) 
  {
    CheckBoxInTable frame = new CheckBoxInTable();  
    frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

Output:

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