cannot create an instance of an abstract class ScrollBar

Answer 1

U can't instance abstract classes

Answer 2

then how do you ues this class?

Answer 3

I don't know what language u r programming, but in abstract classes u should implement them, for ex:
Public class test implements ScrollBar{}

Answer 4

is test a class you made and can we implement classes that are already made in the api?

Answer 5

https://msdn.microsoft.com/pt-br/library/system.windows.forms.scrollbar(v=vs.110).aspx
This is a documentation of c#
And this is of a java
http://help.eclipse.org/mars/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fapi%2Forg%2Feclipse%2Fswt%2Fwidgets%2FScrollable.html
If u can, put your code here =)