Choose witch Component to use by a String

[Bo Gao]

I want to use a component in a page, but i don't know which to use, 
I only know a String at Runtime, How can I do this.

I add <div t:type="component1"></div>to a .tml file, "component1" is the 
Component Class name.
I try to add a method getComponentName() to the java file, then i can control 
which 
component to use, but i failed.

Is their another way to do this?

Thanks.