check reference class type at compile time

If I have some type decla开发者_高级运维rations like:

JCheckBoxMenuItem t1;
JRadioButtonMenuItem t2;

and then a method like

addItem(JMenuItem i)
{
}

can I know if i is a JCheckBoxMenuItem or a JRadioButtonMenuItem type without having an instance of them when I call it with addItem(t1) or addItem(t2) ???

---

If you need different behaviour based on the type of the object, don't use the same method. Make different methods, accepting different argument types.

---

Well, you can always call t1.getClass(), whhich will give you the effective class of the input object.