Hi Guys! I am new to Jaspers IReport . I use this in netbeans 6.5 for reporting but I am facing one problem------>>> I have two fields whose Expression class java.lang.Double, whose values are taken from database. Now I want to add those two fields and display in Third Field, But whenever I use + operator to add those two fields in third field expression it gives me error " The operator + is undefined for the argument type(s) java.lang.Double, java.lang.Double" I dont know why its not allowing to add two Double fields.. So please guys help me out with this problem.... Thanks in Advance...