Cloning 1

[mj616]

I have a question about cloning. If I have a super class called MotorVehicle who has :
private Engine engine= new Engine();

I also have a subClass called Car. I want to be able to clone the Car subclass and also the engine, is there a way to do this?

Ive tried the following but cant do it because Engine is declared private in the MotorVehicle.


public Object clone()
{
try{
Car cloned= (Car)super.clone();
cloned.engine=(Engine)engine.clone();
}
catch(CloneNotSupportedException e){
return null
}

}

Of course I also have a constructor which does super(engine). Is there a way I can clone the engine without being in MotorVehicle?

Thanks to anyone who responds.

 

[thekobbler]

It appears that MotorVehicle does not have a properly formed clone() method. i.e. it doen't return a useable clone, as it hasn't created an engine.

In this case you can either correctly define the clone method in MotorVehicle (if you can!), or instantiate a second Car, and make it have the same properties as the Car your cloning, then return it.

 

[mj616]

Thank you this helps very much