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POStrange java.lang.ClassCastException error
 

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  1. POStrange java.lang.ClassCastException error
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    <p>I use Java and Netbeans 7.2 This is a simple JFrame form. It connects to SQLite database, retrieves all records from one table and puts it into JTable widget (Table1). It works fine.</p> <p>However, I added 4 text fields that are supposed to be filled with values of a row that has been clicked on in the JTable.</p> <p>When the click handler starts it inserts just the first column value in the first text field and then the error message pops up saying (java.lang.ClassCastException).</p> <p>I just can not figure out which row is the problem. Debugger prints error about "uncompilable code" (I dont know how to use debugger).</p> <pre><code>private void Table1MouseClicked(java.awt.event.MouseEvent evt) { try{ int row = Table1.getSelectedRow(); String rowId = (Table1.getModel().getValueAt(row, 0).toString()); String sql = "select * from ljudi where ID='"+rowId+"';"; pst = conn.prepareStatement(sql); rst = pst.executeQuery(); if(rst.next()){ String name = rst.getString("ime"); String surname = rst.getString("prezime"); String address = rst.getString("adresa"); String telephone = rst.getString("telefon"); txt_ime.setText(name); txt_prezime.setText(surname); txt_adresa.setText(address); txt_telefon.setText(telephone); } } catch(Exception e){ JOptionPane.showMessageDialog(null,e); } } </code></pre> <p>I even commented all code inside the method, the Output window shows error messages as soon as I click on a table row.</p> <pre><code>run: Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException at java.lang.Class.cast(Class.java:2990) at org.jdesktop.beansbinding.Binding.convertForward(Binding.java:1312) at org.jdesktop.beansbinding.Binding.getSourceValueForTarget(Binding.java:844) at org.jdesktop.beansbinding.Binding.refreshUnmanaged(Binding.java:1222) at org.jdesktop.beansbinding.Binding.refresh(Binding.java:1207) at org.jdesktop.beansbinding.AutoBinding.tryRefreshThenSave(AutoBinding.java:162) at org.jdesktop.beansbinding.AutoBinding.sourceChangedImpl(AutoBinding.java:227) at org.jdesktop.beansbinding.Binding.sourceChanged(Binding.java:1411) at org.jdesktop.beansbinding.Binding.access$1200(Binding.java:38) at org.jdesktop.beansbinding.Binding$PSL.propertyStateChanged(Binding.java:1618) at org.jdesktop.beansbinding.PropertyHelper.firePropertyStateChange(PropertyHelper.java:212) at org.jdesktop.beansbinding.ELProperty.notifyListeners(ELProperty.java:688) at org.jdesktop.beansbinding.ELProperty.access$800(ELProperty.java:155) at org.jdesktop.beansbinding.ELProperty$SourceEntry.processSourceChanged(ELProperty.java:312) at org.jdesktop.beansbinding.ELProperty$SourceEntry.sourceChanged(ELProperty.java:326) at org.jdesktop.beansbinding.ELProperty$SourceEntry.propertyChange(ELProperty.java:333) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at org.jdesktop.swingbinding.adapters.BeanAdapterBase.firePropertyChange(BeanAdapterBase.java:112) at org.jdesktop.swingbinding.adapters.JTableAdapterProvider$Adapter$Handler.tableSelectionChanged(JTableAdapterProvider.java:81) at org.jdesktop.swingbinding.adapters.JTableAdapterProvider$Adapter$Handler.valueChanged(JTableAdapterProvider.java:91) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194) at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388) at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398) at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:442) at javax.swing.JTable.changeSelectionModel(JTable.java:2352) at javax.swing.JTable.changeSelection(JTable.java:2421) at javax.swing.plaf.basic.BasicTableUI$Handler.adjustSelection(BasicTableUI.java:1085) at javax.swing.plaf.basic.BasicTableUI$Handler.mousePressed(BasicTableUI.java:1008) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.Component.processMouseEvent(Component.java:6264) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6032) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) BUILD SUCCESSFUL (total time: 8 seconds) </code></pre> <p>Any help is much appreciated.</p> <p>Thank you</p> <p>P.S. The full stack trace is here as you asked, I suppose that is it.</p> <p>P.P.S. I solved it in a bit different way:</p> <pre><code>try { int pozicija = jTable1.getSelectedRow(); String rowId = jTable1.getModel().getValueAt(pozicija, 0).toString(); String ime = jTable1.getModel().getValueAt(pozicija,1).toString(); String prezime = jTable1.getModel().getValueAt(pozicija,2).toString(); String adresa = jTable1.getModel().getValueAt(pozicija,3).toString(); String telefon = jTable1.getModel().getValueAt(pozicija,4).toString(); jTextField1.setText(ime); jTextField2.setText(prezime); jTextField3.setText(adresa); jTextField4.setText(telefon); jLabel2.setText(rowId); } catch(Exception e) { JOptionPane.showMessageDialog(null, e); } </code></pre> <p>Instead of running a query on a database, I used the same field values from jTable model. Works fine and the purpose of this is to populate text fields for editing the record. </p> <p>I don't think it would be necessary to query the db again?</p> <p>Btw. I saw the first example on a youtube tutorial by "ProgrammingKnowledge". It has many basic stuff explained.</p> <p>Thank you for the ideas.</p>
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    1. PTQuestion
    1. USChris
    1. USuser1460780
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    1. This table or related slice is empty.
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    1. VO
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      1. POStrange java.lang.ClassCastException error
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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    3. VO
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      1. VTUpMod
    1. COcan you post the full stack trace?
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      1. POStrange java.lang.ClassCastException error
      1. USSimone Gianni
    2. COWhat is jdesktop? Is that a netbeans specific thing?
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      1. POStrange java.lang.ClassCastException error
      1. USthatidiotguy
    3. COThe method that threw the Exception: `...beansbinding.Binding.convertForward(...)` means your UI is trying to automatically convert the type of "something" (from the database) into "something else" that the UI expects. I know netbeans can hook some of these auto-bindings up for you, but I'm not familiar with how to edit/verify them. Perhaps you changed the expected class on accident? Or (more likely), you're doing something like binding a `String` into a checkbox/radiobox--and they expect `boolean`s--or a `String` into a numeric spinner--and it expects an `integer`.
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      1. USEthanB
 

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