如何模拟类实例属性？

class MyClass {
  constructor(prop1, prop2) {
    this.prop1 = prop1;
    this.prop2 = prop2;
  }
}

const myObj = new MyClass('value1', 'value2');
console.log(myObj.prop1); // 输出: value1
console.log(myObj.prop2); // 输出: value2

class MyClass:
    def __init__(self):
        self._prop1 = None

    @property
    def prop1(self):
        return self._prop1

    @prop1.setter
    def prop1(self, value):
        self._prop1 = value

my_obj = MyClass()
my_obj.prop1 = 'value1'
print(my_obj.prop1)  # 输出: value1

public class MyClass {
    private String prop1;

    public void setProp1(String value) {
        this.prop1 = value;
    }

    public String getProp1() {
        return this.prop1;
    }
}

MyClass myObj = new MyClass();
myObj.setProp1("value1");
System.out.println(myObj.getProp1()); // 输出: value1