One time only data display on the Jasper report in java

Question

i am creating jasper report for view the student details. i have a textfield if the enter correct student id relavent student details display on the jsper report below. i called the jsper report inside the jpanel.

if i enter first time student id 3 it displayed result success then if i enter the second time student id 4 the same result shown. i don't know why.

  HashMap a = new HashMap();
        a.put("id", txtno.getText());

        try {

        JasperDesign jdesign = JRXmlLoader.load("C:\\Users\\kobinath\\Documents\\NetBeansProjects\\JavaApplication138\\src\\report1.jrxml");
        JasperReport jreport = JasperCompileManager.compileReport(jdesign);        
        JasperPrint jprint = JasperFillManager.fillReport(jreport, a, con);
         //  JasperViewer.viewReport(jprint);
         JRViewer vw=new JRViewer(jprint); 
         jPanel1.setLayout(new BorderLayout());
         jPanel1.repaint();

         jPanel1.add(vw);
         jPanel1.revalidate();



        } catch (JRException ex) {

        }

When you debug the code, what values are being held in `a` after `a.put("id", txtno.getText());`? — lealceldeiro, Dec 31 '19 at 12:25
sir i tested through the jsperviewer successfullly working but if i call this inside jpanel had problem for enter next id. i think refresh the report — deva ram, Dec 31 '19 at 12:28
("id", txtno.getText()) student id 3 displayed on txtno.getText() success — deva ram, Dec 31 '19 at 12:31

score 1 · Accepted Answer · answered Dec 31 '19 at 12:37

1

I think that revalidate() alone isn't enough to refresh the panel. You may reference to this link to make sure that repaint() is better to be called. I hope this helps you solve your problem.

P.S. You can swap the two lines before the last line.

answered Dec 31 '19 at 12:37

Mohammed Deifallah

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i tried repaint(); revalidate(); not working for me – deva ram Dec 31 '19 at 12:43
You may call ```revalidate()``` first. If the problem is still there, then it's advisable to make ```jPanel1``` a new instance of its class. – Mohammed Deifallah Dec 31 '19 at 19:44

One time only data display on the Jasper report in java

1 Answers1