Class cls = MyClass.class; Field fields = cls.getDeclaredFields();
Class cls = MyClass.class; Field field = cls.getDeclaredField("privateField"); field.setAccessible(true); Object value = field.get(obj);In the first example, we retrieve all the declared fields of the class MyClass using the getDeclaredFields method. The returned array contains all the fields of the class, including private and protected fields. In the second example, we access the value of a private field named "privateField" in the class MyClass. We first retrieve the field object using the getDeclaredField method and then set its accessibility to true using the setAccessible method. Finally, we can get the value of the field using the get method. It is difficult to determine the package library of these examples as they are dependent on the package structure of the MyClass class.