Drag and Drop in Selenium WebDriver

Now we can perform Drag and Drop actions in WebDriver using Actions class. Below is the code for this:

Actions builder = new Actions(driver);
builder.dragAndDrop(source, target);

Here 'source' is the source(from element) web element and 'target' is the target(to element) web element. 
Or

/**
 * Drags the web element fromWebElement and drop at web element
 * toWebElement
 * 
 * @param fromWebElement
 * @param toWebElement
 */
public void dragAndDrop(WebElement fromWebElement, WebElement toWebElement) {
 Actions builder = new Actions(driver);

 Action dragAndDrop = builder.clickAndHold(fromWebElement)
   .moveToElement(toWebElement).release(toWebElement).build();

 dragAndDrop.perform();
}

Please visit here for more details.

Using robot:

/**
 * Drags the web element fromWebElement and drop at web element
 * toWebElement
 * 
 * @param fromWebElement
 * @param toWebElement
 */
public void dragAndDrop(WebElement fromWebElement, WebElement toWebElement) {
 Point coordinates1 = fromWebElement.getLocation();
 Point coordinates2 = toWebElement.getLocation();

 Robot robot = new Robot();

 robot.mouseMove(coordinates1.getX(), coordinates1.getY());
 robot.mousePress(InputEvent.BUTTON1_MASK);
 robot.mouseMove(coordinates2.getX(), coordinates2.getY());
 robot.mouseRelease(InputEvent.BUTTON1_MASK);

}

For more details on mouse actions in Robot please visit here
For more tricks on drag and drop actions please visit my post Drag and Drop tricks in Selenium