Class used to assign a variable is different from class used to declare it

Question

Are the following two versions of "pane" the same in Java?

Pane pane1 = new HBox();
HBox pane2 = new HBox();

What is the difference between the two and why would you declare pane1 this way?

Thank you very much.

Related: https://stackoverflow.com/questions/383947 – Jon Skeet Jul 14 '17 at 17:53 — Jon Skeet, Jul 14 '17 at 17:53
This sounds like homework. Do you have an idea yourself? – f1sh Jul 14 '17 at 17:53 — f1sh, Jul 14 '17 at 17:53

score 0 · Answer 1 · answered Jul 14 '17 at 17:54

0

There is a hierarchy of classes. See the Figure below.

In a variable of Pane type you could store a VBox or a HBox for example.

But if you declare the variable as VBox, it can only store a VBox object.

answered Jul 14 '17 at 17:54

Rafael Coelho

1 Answers1