Instance an Object which name is in a string

Question

hi, I've this problem:
I must instance an Object, but the Object's type name is stored in a string. I could write a code similar to this:
Object c = new "Car"();
Someone can help me?

Answer 1

sorry, but I don't understand very well....don't panic, doremisafolatido ( is that right? ) isgiving you an impromptu lesson in polymorphism!
Close enough. :)
He'll need polymorphism. If he couldn't
construct a Car the normal way (without reflection),
he won't be able to cast to one. If he writes the
Car as follows, he can cast to a Runnable (I know you
know this, but he seems not to).
public class Car implements Runnable
public void run() {
// doSomething
String name = "my.package.Car";
Class clazz = Class.forName(name);
Object obj = clazz.newInstance();
((Runnable)obj).run();
I'd advise against using Runnable for anything other than threads. I've used Runnable in what seems like a perfectly acceptable situation, and it confused the hell out of everyone else on the project - they associate Runnable with threading, and couldn't get their head around what I was using it for. one of our technical leads got very upset that I was introducing threads to the code without good reason. It beggars belief that people in such high-profile positions couldn't tell the difference, but they couldn't, so I learnt not to use Runnable for anything other than passing to threads