Handling various WebElement using WebDriver

Common Element Interactions

element.click();
element.sendKeys("text");
element.clear();
String text = element.getText();
boolean visible = element.isDisplayed();

Handling Dropdowns

Select dropdown = new Select(driver.findElement(By.id("country")));
dropdown.selectByVisibleText("India");

Handling Checkboxes and Radio Buttons

These are interacted with using click(), and their state can be checked with isSelected() before deciding whether to click.