How to know property value if in runtime I have reference to bean instance and property name?

I have following bean

class MyBean{
  Date myDate;
  String anotherProperty;
  ...
}

and following method:

public static Date getDateField(MyBean instance, String propertyName){
   ...
}

I want to invoke following method like this:

getDateField(myBeanInstance, "myDate")

I am feel that it is possible to achieve but I have not ideas how to realize getDateField method.