How to convert a string into an objects name?

Hi
I have the following problem;
I have a string
String a = "e1"
and a method
call(Event e1) that calls the "Event" class with object the name of the string a.
How can I convert the strings name into an object so as to use it in the "call" method?
Any ideas?
Thanks in advance

I don't know if this helps you, but you can do things like this.
String a = "com.example.SomeEvent";
//Instantiate com.example.SomeEvent
Object o = Class.forName(a).newInstance();SomeEvent must have a non-argument constructor for this to work.
Class that will be instantiated depens on runtime value of String a, and can be different across different executions of the program.

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