JavaScript to Java

Hi,
I have a COM(ActiveX) component written in Delphi which has some methods with parameter type as OleVariant. These methods gets called from HTML(Javascript).
Now i want to implement the same COM(ActiveX)component features into Java applet so that i can call applet methods instead of COM
Now here is my question.
I pass 'this'(say for ex TextBox) from HTML to ActiveX components method whose formal parameter type is OleVariant.
What is the datatype(which is equalent to OleVariant) in java so that i can do what ever my COM component does?
Is there any datatype in java which is as strong and similar to OleVariant
Advanced thanks
Raju