Here is the code for a test that has a checkbox and performs the select and deselect operations:

@Test
public void testCheckBox() {
  //Get the Checkbox as WebElement using it's value attribute
  WebElement airbags = driver.findElement(By.xpath("//input[@value='Airbags']"));

  //Check if its already selected? otherwise select the Checkbox
  //by calling click() method
  if (!airbags.isSelected()) {
    airbags.click();
  }

  //Verify Checkbox is Selected
  assertTrue(airbags.isSelected());

  //Check Checkbox if selected? If yes, deselect it
  //by calling click() method
  if (airbags.isSelected()) {
    airbags.click();
  }

  //Verify Checkbox is Deselected
  assertFalse(airbags.isSelected());
}

We can locate a checkbox in a way similar to locating any other element on a page. In this example, XPath is used to locate the checkbox by its value attribute:

WebElement airbags = driver.findElement(By.xpath("//input[@value='Airbags']"));

We can select or deselect a checkbox by using the click() method. There are no separate methods to perform these operations. When we want to select a checkbox, we need to be careful that it's not already selected, otherwise calling the click() method will deselect the checkbox. We can check if a checkbox is already selected by calling the isSelected() method, which returns true if it's selected and false if it's not selected. Here, the click() method will be called only when the checkbox is not selected:

if (!airbags.isSelected()) {
    airbags.click();
}

Similarly, to deselect the checkbox, we need to see if it is already selected:

if (airbags.isSelected()) {
  airbags.click();
}