JCheckBox is a swing component in Java that represents a checkbox with a label. It allows users to select one or more items from a list of available options.

Here is an example of how to create and use JCheckBox in Java:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CheckBoxExample extends JFrame {
    JCheckBox checkBox1, checkBox2;
    JLabel label;

    CheckBoxExample() {
        checkBox1 = new JCheckBox("Java");
        checkBox1.setBounds(100, 100, 150, 50);
        checkBox2 = new JCheckBox("Python");
        checkBox2.setBounds(100, 150, 150, 50);
        label = new JLabel();
        label.setBounds(100, 200, 300, 50);

        add(checkBox1);
        add(checkBox2);
        add(label);

        setSize(400, 400);
        setLayout(null);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        checkBox1.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                label.setText("Java Checkbox: " + (e.getStateChange() == 1 ? "checked" : "unchecked"));
            }
        });

        checkBox2.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                label.setText("Python Checkbox: " + (e.getStateChange() == 1 ? "checked" : "unchecked"));
            }
        });
    }

    public static void main(String[] args) {
        new CheckBoxExample();
    }
}

This program creates two JCheckBox components with labels "Java" and "Python" and adds them to the frame. It also adds a JLabel to display the state of the checkboxes.

When the user selects or deselects a checkbox, an ItemListener is invoked that sets the text of the label to the state of the checkbox.