Instance name from string

Guys, I've been looking what feels like everywhere for an answer to this java.reflection problem.

I want to use the contents of a string to create and instance of an object that has the name of what the string stores.

Eg.
String[] carName = {"volvo","vw","bmw"};

car carName[0];
car carName[1];
car carName[2];

Car car = (Car) Class.forName("Volvo").newInstance();