where ReportUtils(user built class file) is there in the classpath of your jasperReport. Within the getList(), iterate through the lines collection which you have built up as in :
and concat each object(line1 and line2) in the Collection(lines) to a String and return that string from the getList();
Tina
SCJP 1.4, SCWCD 1.4
Don't get me started about those stupid light bulbs.