Hi all!
Well, what I wanted is Class.isInstance(Object)
I don't remember who pointed this out, but thank you a lot!!! :-)
On Thu, 2003-02-20 at 16:35, Shapira, Yoav wrote:
>
> Howdy,
>
> > The problem is that I want to test if an object is subclass of a
> >java.lang.Class INSTANCE... Nonsense example:
>
> Maybe I'm still not understanding ;) But why doesn't the instanceof
> operator work for you?
>
> Your example:
> > java.util.Date date1 = new java.util.Date();
> > java.sql.Date date2 = new java.sql.Date();
> > Class clasz = date1.getClass();
> > if (date2 instanceof clasz)
> > {
> > do something...
> > }
>
> Why not just do
> if(date2 instanceof date1) ...
> rather than if(date2 instanceof date1.getClass()) ??
>
> Or are you looking for a comparison that doesn't make subclasses equal?
> For example:
>
> Set h1 = new LinkedHashSet();
> if(h1 instanceof LinkedHashSet) {
> // This is true
> }
>
> if(h1 instanceof HashSet) {
> // This is true
> }
>
> if(h1 instanceof Set) {
> // This is true
> }
>
> But you only want the first one? How about
>
> Object obj1 = new Object1();
> Object obj2 = new Object2(); // Object2 extends Object1
>
> if(obj1 instanceof obj1) {
> // This is false
> }
>
> if(obj2 instanceof ob1) {
> // This is true
> }
>
> if(obj2.getClass().getName().equals(obj1.getClass().getName()) {
> // This is false -- is this what you want?
> }
>
> Yoav Shapira
> Millennium ChemInformatics
>
>
>
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