WebElement usernameField = driver.findElement(By.id("username"));// Input operations:
usernameField.clear();
usernameField.sendKeys("tester_admin");
// State checks:
boolean visible = usernameField.isDisplayed();
boolean enabled = usernameField.isEnabled();
// Retrieving information:
String currentText = usernameField.getAttribute("value");
String placeholder = usernameField.getAttribute("placeholder");