Calling GWT Java function from JavaScript

I am a newcomer to GWT and JavaScript. There are similar question of this type I have tried to follow, but I keep failing.

I have a GWT app, I need to call a Java function from Javascript( on the onclick of a href tag, in particular.) Following is what I have done.

public class JSNITest {

 public static void handleAnchorClick(int a , int b) {
   Window.alert("Current row and Column is " + a + "  " + b);
 }

 public static native void exportMyFunction()/*-{
    $wnd.handleAnchorClick = function(param1,param2){
        @company.package.class.JSNITest::handleAnchorClick(*)(param1,param2);
 }-*/;

}

And in the HTML,

<a href="javascript:handleAnchorClick(a1,a2);">link</a> 

(a1 , a2) are two integer variables in my code. I have also called EnclosingClass.exportMyFunction() in the entry point function. I keep running into various kinds of exceptions(No Such class exception). Can someone please correct me?

Regards