如何在调用javascript函数时调用gwt函数

package mypackage; public MyUtilityClass { //Method to be called from javascript, could be in any other class too public static int computeLoanInterest(int amt, float interestRate, int term) { ... } //This method should be called during application startup public static native void exportStaticMethod() /*-{ //the function named here will become available in javascript scope $wnd.computeLoanInterest = $entry(@mypackage.MyUtilityClass::computeLoanInterest(IFI)); }-*/; }