Bug? [solved] java.lang.ClassCastException with Lists and CallSub

[Creideiki]

I get the following error:

java.lang.ClassCastException: anywheresoftware.b4a.objects.collections.List cannot be cast to java.util.List

What do I do:

I have a Service:

Sub Process_Globals
   Dim ToDoList As List
End Sub

Sub Service_Create
   ToDoList.Initialize
End Sub

Sub getAdapterVersion(adap As Object)
   CallSub2(adap, "readVersion", ToDoList)
End Sub

getAdapterVersion is called from the Activity with a class object of a class with the following sub:

Sub readVersion(tdl As Object)
   Dim todoList = tdl As List
end sub

The ClassCastException raises in the line

Dim todoList = tdl As List

What happens here and what can I do to work around? I can't find anything wrong here; the object is a List from start to end!?

 

[warwound]

Shouldn't that be:

Dim todoList As List=tdl

Martin.

Sent from my GT-I9300 using Tapatalk 2

 

[Creideiki]

Shouldn't that be:

Dim todoList As List=tdl

Martin.

Well... that's both syntactically allowed. And it both doesn't work.

 

[Erel]

You should change the sub signature to:

Sub readVersion(tdl As List)
    Dim todoList = tdl As List
end sub

It is related to List being a wrapper of a Java list.

 

[Creideiki]

You should change the sub signature to:

Sub readVersion(tdl As List)
    Dim todoList = tdl As List
end sub

It is related to List being a wrapper of a Java list.

I thought I could only use Object as argument type when I call a sub via CallSub. I'll give it a try.

What can I use as argument type when calling with CallSub??

 

[Erel]

You should explicitly set the types. The only exception is that if the object is stored as an Object (in a List for example) then you should use Object.