Sélectionnez la classe en sélénium
Select objSelect = new Select(driver.findElement(By.id(Element_ID)));
objSelect.selectByIndex(index);
objSelect.selectByIndex(index);
// Or can be used as
objSelect.selectByVisibleText(text);
objSelect.selectByVisibleText(text);
// Or can be used as
objSelect.selectByValue(value);
objSelect.selectByValue(value);
Easy Eel