Java: Creating a subclass object from a parent object

Question

Newbie Java question. Say I have:

public class Car{
  ...
}

public class Truck extends Car{
  ...
}

Suppose I already have a Car object, h

Answer 1

You could use the reflection API to loop through each of the Car fields and assign the value to the equivalent Truck fields. This can be done within truck. Further it is the only way to access the private fields of Car - at least in an automatic sense, providing that a security manager is not in place and restricting access to private field.