I need help with what I believe to by a syntax error.

Question

The following snippet is from a class that extends AbstractTableModel.
dataSource is an ArrayList, containing instances of a class for which getDescription() is a valid method.
Line six is giving me an error. Maybe someone can tell me how to do this properly.
Aside from that, I do have more code to insert. I just want to get this part right before adding the rest.
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
Object budgetDatum = null;
switch(columnIndex){
case 0:
budgetDatum = dataSource.get(rowIndex).getDescription();
return budgetDatum;
}

Answer 1

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By line six, I am referring to the following, which is the sixth line of my code:
budgetDatum = dataSource.get(rowIndex).getDescription();
The method, "getDescription()", is not recognized as a valid method, which leads me to believe I am accessing the member of dataSource incorrectly.
>
You still aren't providing all of the information needed.
What type of object does 'dataSource.get' return?
You probably need to cast the object to the proper type and call 'getDescription on that type.
If it returns a BudgetDatum class object then cast it as that
BudgetDatum budgetDatum;
budgetDatum = ((BudgetDatum) dataSource.get(rowIndex)).getDescription();If you aren't using generics the 'get' method is probably just returning an Object.