how to change the class type ?

[Sonia]

Hello,

I want to ask how to change the an object class type to XYDataset type ?

i.e. I want to make the XYDataset data reference to Object obj,

Thanks for telling me

[David Gilbert]

You can cast an Object to an XYDataset using:

XYDataset data = (XYDataset) obj;

...but you will get an exception if obj doesn't implement the XYDataset interface, so you might want to check first:

XYDataset data = null;
if (obj instanceof XYDataset) {
data = (XYDataset) obj;
}

if (data != null) {
// do something...
}

Regards,

Dave Gilbert