Refresh a jTable

Question

I can't seem to get my table to refresh. I created a refresh button that calls jTable1.repaint();

private void jButton8ActionPerformed(java.awt.event.ActionEvent evt)        
// Reader Refresh
        jTable1.repaint();
    }

I also tried just recalling the RegistryValues again in the button like RegistryValues.arp(null);

private void jButton8ActionPerformed(java.awt.event.ActionEvent evt)        
// Reader Refresh
        RegistryValues.arp(null);
    }

Also tried combining the registryvalues and repaint in the button.

Below is the code for my jTable. The RegistryValues are from another class that uses JNA to read the registry if that matters.

jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {"Protected Mode at Startup", RegistryValues.arp(null)},
                {"Display PDF in browser", RegistryValues.arb(null)},
                {"EULA Accepted?", RegistryValues.are(null)},
                {null, null}
            },
            new String [] {
                "Software", "Status"
            }
        ));

For better help sooner, please include an [sscce](http://www.sscce.org). — user1329572, Aug 22 '12 at 17:08

Reimeus · Accepted Answer · 2012-08-23T09:41:39.380

3

Neither

jTable1.repaint();

or

RegistryValues.arp(null);

will actually refresh the table with new values. For this you need to either update the current table model or set a new model but in your ActionListener.

As you're using DefaultTableModel, which is mutable, you could create an update helper method for the model.

Something like:

DefaultTableModel model = (DefaultTableModel) table.getModel();
model.setValueAt(RegistryValues.arp(null), 0, 1);
// set more row data, etc.

Note: You could save the model as a class member variable and eliminate the need for casting.

edited Aug 23 '12 at 09:41

answered Aug 22 '12 at 17:16

Reimeus

158,255
15
216
276

@jerhynsoen: You define a DefaultTableModel in your question. Make the default table model its own class with update capability. – Gilbert Le Blanc Aug 22 '12 at 17:23
@Gilbert, Its own class or its own method? – jerhynsoen Aug 22 '12 at 18:28
@jerhynsoen: Extend DefaultTableModel into a MyTableModel class and add update capability. Sorry that I wasn't clearer the first time. – Gilbert Le Blanc Aug 22 '12 at 18:49
-1 for the second part: never-ever fire any events on behalf of the model (that's its own responsibility). Instead, fix the model to fire the events as needed. – kleopatra Aug 23 '12 at 09:13

Refresh a jTable

1 Answers1

Linked

Related