To perform a drag and drop operation in WebDriver, you can use the Actions class. Here's an example of how you can do it:  Actions actions = new Actions(driver);
WebElement sourceElement = driver.findElement(By.id("source"));
WebElement targetElement = driver.findElement(By.id("target"));
actions.dragAndDrop(sourceElement, targetElement).perform();  This will drag the source element and drop it onto the target element. The Actions class is a part of the org.openqa.Selenium.interactions package, so you will need to import this package in order to use it.  Alternatively, you can also use the dragAndDropBy method, which allows you to specify the x and y offsets in pixels to which the element should be moved:  Actions actions = new Actions(driver);
WebElement sourceElement = driver.findElement(By.id("source"));
int xOffset = 100;
int yOffset = 100;
actions.dragAndDropBy(sourceElement, xOffset, yOffset).perform();  This will move the source element by 100 pixels to the right and 100 pixels down.