如何根据变量设置属性？

const propertyName = 'backgroundColor';
const value = 'red';

const element = document.getElementById('myElement');
element.style[propertyName] = value;

property_name = 'background_color'
value = 'red'

element = {'background_color': None}
element[property_name] = value

String propertyName = "backgroundColor";
String value = "red";

JLabel element = new JLabel();

Field field = JLabel.class.getDeclaredField(propertyName);
field.setAccessible(true);
field.set(element, value);

string propertyName = "BackgroundColor";
string value = "red";

Control element = new Control();

PropertyInfo propertyInfo = element.GetType().GetProperty(propertyName);
propertyInfo.SetValue(element, value, null);