Does JReport support user defined parameters?
In general, parameters are used to filter data in a report at run time – for example, parameters can control the date ranges or other data criteria returned in a report. However, in JReport, parameters can also be directly inserted in a report, referenced by formulas to control object properties, used to link reports, and used to dynamically group or sort data. With JReport, parameters can also be used to control report output format, apply style sheets, etc.