How to pass a Java object to JS?

In Nashorn I can call a JS function with a Java object as parameter, like this:
```invocable.invokeFunction("funcName", new Date());```
How can I do that in J2V8 ？ There are only int, boolean, double, String and V8Value can be push into a V8Array which is the only parameter of
```v8.executeFunction("funcName", v8Array)```