Parâmetros Ireport do tido TimeStamp (Resolvido)

Pessoal, como faço para passar como parâmetros campos TimeStamp para o Ireport ?
Eu estou usando o JDateChooser para pegar a data, mas ele da erro:

String pontos = “00:00:00”;
String espaco = " ";
Timestamp timestamp = new Timestamp(System.currentTimeMillis());
date_i = new SimpleDateFormat(((JTextField) Data_Inicial.getDateEditor().getUiComponent()).getText()+espaco+pontos).format(timestamp.getTime());
date_f = new SimpleDateFormat(((JTextField) Data_Final.getDateEditor().getUiComponent()).getText()+espaco+pontos).format(timestamp.getTime();

Erro:
java.lang.ClassCastException: java.lang.String cannot be cast to java.sql.Timestamp
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.setTimestamp(JRJdbcQueryExecuter.java:605)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.setStatementParameter(JRJdbcQueryExecuter.java:569)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.setStatementParameter(JRJdbcQueryExecuter.java:399)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter$1.visit(JRJdbcQueryExecuter.java:332)
at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter$QueryParameter.accept(JRAbstractQueryExecuter.java:157)
at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter.visitQueryParameters(JRAbstractQueryExecuter.java:646)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createStatement(JRJdbcQueryExecuter.java:317)
at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createDatasource(JRJdbcQueryExecuter.java:196)
at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1086)
at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:667)
at net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1258)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:877)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:822)
at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:61)
at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:849)
at br.com.relatorios.RelatorioService.gerarRelatorio(RelatorioService.java:35)
at br.com.relatorios.Relatorio_Reservas.btn_ImprimirActionPerformed(Relatorio_Reservas.java:188)
at br.com.relatorios.Relatorio_Reservas.access$000(Relatorio_Reservas.java:24)
at br.com.relatorios.Relatorio_Reservas$1.actionPerformed(Relatorio_Reservas.java:95)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
at java.awt.Dialog.show(Dialog.java:1084)
at java.awt.Component.show(Component.java:1671)
at java.awt.Component.setVisible(Component.java:1623)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1005)
at br.com.relatorios.Relatorio_Reservas$2.run(Relatorio_Reservas.java:233)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Existe o tipo Timestamp no java. Use-o.

Mestre, Muito Obrigado !

Consegui resolver. Vlw