Parameters and Variables

Parameters ($P)

<parameter name="companyName" class="java.lang.String"/>
<parameter name="fromDate" class="java.util.Date"/>

Map<String, Object> params = new HashMap<>();
params.put("companyName", "GroovyGrails Pvt Ltd");
params.put("fromDate", new Date());
JasperPrint print = JasperFillManager.fillReport(report, params, ds);

Variables ($V)

• $V{PAGE_NUMBER} — built-in page counter, ideal for “Page X of Y” footers.
• $V{REPORT_COUNT} — current record number.
• Custom sums: variable of class java.lang.Double, calculation Sum, expression $F{salary}.