tengo un jList con items(Estos items son id de una tabla SQL,Ver Imagen) Lo que pretendo hacer que cada vez que pulse a un item del Jlist salga el nombre del Id(sentencia SQL) en un jtextfield. Pero Cada vez que pulse a un elemento del jlist me salta un error.Seguro que es una chorrada pero no consigo solucionarlo 🙂

Imagen

Error:

Exception in thread "AWT-EventQueue-0" org.hibernate.TypeMismatchException: Provided id of the wrong type for class prueba.Cancion. Expected: class prueba.Cancion, got class java.lang.Integer at org.hibernate.event.internal.DefaultLoadEventListener.checkIdClass(DefaultLoadEventListener.java:166) at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:86) at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1239) at org.hibernate.internal.SessionImpl.access$  1900(SessionImpl.java:203) at org.hibernate.internal.SessionImpl$  IdentifierLoadAccessImpl.doLoad(SessionImpl.java:2804) at org.hibernate.internal.SessionImpl$  IdentifierLoadAccessImpl.load(SessionImpl.java:2778) at org.hibernate.internal.SessionImpl.get(SessionImpl.java:1075) at prueba.Principal.rellenarValoresLista(Principal.java:46) at prueba.Principal.valueChanged(Principal.java:178) at javax.swing.JList.fireSelectionValueChanged(JList.java:1796) at javax.swing.JList$  ListSelectionHandler.valueChanged(JList.java:1810) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211) at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:405) at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:415) at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:459) at javax.swing.JList.setSelectionInterval(JList.java:2065) at javax.swing.plaf.basic.BasicListUI$  Handler.adjustSelection(BasicListUI.java:2739) at javax.swing.plaf.basic.BasicListUI$  Handler.mousePressed(BasicListUI.java:2695) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:280) at java.awt.Component.processMouseEvent(Component.java:6530) 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:4522) 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.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) 

Codigo:

Transaction tx = null; DefaultListModel modeloLista = new DefaultListModel(); SessionFactory sf = HibernateUtil.getSessionFactory(); Session s = sf.openSession(); private final List cancion;  public Principal() {     initComponents();     tx = s.beginTransaction();     cancion = s.createQuery("FROM Cancion").list();     for (Iterator iterator = cancion.iterator(); iterator.hasNext();) {         Cancion cancion1 = (Cancion) iterator.next();          jList1.setModel(modeloLista);         modeloLista.addElement(cancion1.getCancionId());     }     jList1.addListSelectionListener(this);     tx.commit(); //revisar }  private void rellenarValoresLista(int index) {     tx = s.beginTransaction();     Cancion cancion2 = (Cancion) cancion.get(index);     cancion2 = (Cancion) s.get(Cancion.class, cancion2.getCancionId());     nameText.setText(cancion2.getTitulo());      tx.commit(); }  /**  * This method is called from within the constructor to initialize the form.  * WARNING: Do NOT modify this code. The content of this method is always  * regenerated by the Form Editor.  */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code">                           private void initComponents() {      jScrollPane1 = new javax.swing.JScrollPane();     jList1 = new javax.swing.JList<>();     nameText = new javax.swing.JTextField();     jTextField2 = new javax.swing.JTextField();     jTextField3 = new javax.swing.JTextField();     jTextField4 = new javax.swing.JTextField();     jLabel1 = new javax.swing.JLabel();      setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);      jList1.setModel(new javax.swing.AbstractListModel<String>() {         String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };         public int getSize() { return strings.length; }         public String getElementAt(int i) { return strings[i]; }     });     jScrollPane1.setViewportView(jList1);      nameText.setText("jTextField1");      jTextField2.setText("jTextField2");      jTextField3.setText("jTextField3");      jTextField4.setText("jTextField4");      jLabel1.setText("jLabel1");      javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());     getContentPane().setLayout(layout);     layout.setHorizontalGroup(         layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)         .addGroup(layout.createSequentialGroup()             .addContainerGap()             .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE)             .addGap(36, 36, 36)             .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                 .addComponent(nameText, javax.swing.GroupLayout.PREFERRED_SIZE, 180, javax.swing.GroupLayout.PREFERRED_SIZE)                 .addGroup(layout.createSequentialGroup()                     .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)                     .addGap(111, 111, 111)                     .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 63, javax.swing.GroupLayout.PREFERRED_SIZE))                 .addGroup(layout.createSequentialGroup()                     .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE)                     .addGap(65, 65, 65)                     .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 194, javax.swing.GroupLayout.PREFERRED_SIZE)))             .addContainerGap(55, Short.MAX_VALUE))     );     layout.setVerticalGroup(         layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)         .addGroup(layout.createSequentialGroup()             .addGap(30, 30, 30)             .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                 .addGroup(layout.createSequentialGroup()                     .addComponent(nameText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)                     .addGap(85, 85, 85)                     .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                         .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)                         .addComponent(jLabel1))                     .addGap(73, 73, 73)                     .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                         .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)                         .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))                 .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))             .addContainerGap(20, Short.MAX_VALUE))     );      pack(); }// </editor-fold>                          /**  * @param args the command line arguments  */ public static void main(String args[]) {     /* Set the Nimbus look and feel */     //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">     /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.      * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html       */     try {         for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {             if ("Nimbus".equals(info.getName())) {                 javax.swing.UIManager.setLookAndFeel(info.getClassName());                 break;             }         }     } catch (ClassNotFoundException ex) {         java.util.logging.Logger.getLogger(Principal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);     } catch (InstantiationException ex) {         java.util.logging.Logger.getLogger(Principal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);     } catch (IllegalAccessException ex) {         java.util.logging.Logger.getLogger(Principal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);     } catch (javax.swing.UnsupportedLookAndFeelException ex) {         java.util.logging.Logger.getLogger(Principal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);     }     //</editor-fold>      /* Create and display the form */     java.awt.EventQueue.invokeLater(new Runnable() {         public void run() {             new Principal().setVisible(true);         }     }); }  // Variables declaration - do not modify                      private javax.swing.JLabel jLabel1; private javax.swing.JList<String> jList1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JTextField jTextField2; private javax.swing.JTextField jTextField3; private javax.swing.JTextField jTextField4; private javax.swing.JTextField nameText; // End of variables declaration                     @Override public void valueChanged(ListSelectionEvent e) {     if (e.getValueIsAdjusting()) {         rellenarValoresLista(jList1.getSelectedIndex());     } }