I m working with sample DB.I have created a report with multi-select query.I have parameter called $P{ID} with collection class.Filed is $F{FIRSTNAME},how can i show the names horizontally with comma separation by sending multiple parameters.I have tried with list component.It shows the value horizontally by selecting print order horizontal.But still i m not getting about comma separation.Can anyone have the solution for this? Help me!!!!! Thanks & Regards, Rambo.