B4J Question List1.Add error

[Put Claude]

In B4J
If Lgpgsv1.Size < 20 Then Lgpgsv1.Add("0") will give the error 'java.lang.UnsuportedOperationExeption'
Lgpgsv1.Add("0") also will give the error 'java.lang.UnsuportedOperationExeption', so I think this is the devil,
I cannot add anything to the list.

Put Claude Belgium

 

[Erel]

Can you post the code that creates the list?

 

[Put Claude]

Dim sf As JStringFunctions 'in Process_Globals, maybe the use of this lib causes the problem
'......
'extract the items of this string to a list
Lgpgsv1.Initialize
Lgpgsv1= sf.Split(newstr,",") 'splitt all items into a list
If Lgpgsv1.Size < 20 Then Lgpgsv1.Add("0") 'uphere I got the error

'--------------------------------------
'I did a workaround like this:
'extract the items of this string to a list
Lgpgsv1.Initialize
Lgpgsv1= sf.Split(newstr,",") 'splitt all items into a list
If Lgpgsv1.Size < 20 Then newstr = newstr & "0"
Lgpgsv1.Initialize 're-initialize
Lgpgsv1= sf.Split(newstr,",") 'again splitt all items into a list

 

[Daestrum]

Looks like if you use

myList = sf.split(??,",")

you get the error
If you change it to

myList.AddAll(sf.split(....))

you can then add things to the end of the list.
Think you have been caught by java reference to object in this case the sf list has a definite size, it wont let you extend it, and using
mylist = sf.split(...) you set your list as a reference to the sf list.

 

[Put Claude]

Thanks a lot
Problem solved

Lgpgsv1.Initialize
Lgpgsv1.AddAll(sf.split(newstr,","))
If Lgpgsv1.Size < 20 Then Lgpgsv1.Add("0")

'now I can add to the list
Thanks again!!!

Put Claude Belgium