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Thread: own Tablemodel with checkbox

  1. #1
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    Default own Tablemodel with checkbox

    Can anyone tell my why my code isn't working as intended?
    i want to create a table with a check box at the end for deleting several rows easily.
    I'm working with Netbeans and it seems that the way i'm creating my table doesnt play along with the boolean datatype i'm trying to use.

    Any tips would be highly appreciated.
    Thanks in advance

    public class UserTab {
     
        private String name;
        private String pw;
        boolean loeschen=false;
     
        public UserTab(String n, String p)
        {
            name=n;
            pw=p;
            //loeschen=false;
        }
     
        UserTab() {
            name="";
            pw="";
            //loeschen=false;
        }
     
        public String getName()
        {
            return name;
        }
        public String getPw()
        {
            return pw;
        }
     
        public boolean delete()
        {
            return loeschen;
        }
     
        void setName(String string) {
            name=string;
        }
     
        void setPw(String string) {
            pw=string;
        }
     
        void setLoeschen(boolean b) {
            loeschen=b;
        }
     
     
    }

    public class UserDatenmodell extends AbstractTableModel{
     
        private Vector<UserTab> user;
     
        public UserDatenmodell(Vector<UserTab> u)
        {
            this.user=u;
        }
     
        public int getRowCount() {
            return this.user.size();
        }
     
        public int getColumnCount() {
            return 3;
        }
     
        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            Object erg = null;
            UserTab ut=user.get(rowIndex);
            switch(columnIndex)
            {
                case 0: erg=ut.getName(); break;
                case 1: erg=ut.getPw(); break;
                case 2: erg=ut.delete(); break;
     
            }
            return erg;
     
        }
     
        @Override
        public boolean isCellEditable(int rowIndex, int columnIndex)
        {
            if(columnIndex == 0)
                return false;
            else
              return true;
        }
     
        @Override
        public void setValueAt(Object aValue, int rowIndex, int columnIndex)
        {
            UserTab k = user.get(rowIndex);
     
            switch(columnIndex)
            {
                case 0: k.setName((String) aValue);
                        break;
     
                case 1: k.setPw((String) aValue);
                        break;
     
                case 2: boolean b = Boolean.valueOf(aValue.toString());
                        k.setLoeschen(b);
                        break;
     
            }
        }
     
        @Override
        public Class<?> getColumnClass(int columnIndex)
        {
            Class<?> erg = String.class;
     
            if(columnIndex == 2)
                erg=boolean.class;
     
     
     
     
            return erg;
        }
    }

    public class UserScreen extends javax.swing.JFrame {
     
        Vector<UserTab> v=new Vector<UserTab>();
     
        /** Creates new form UserScreen */
        public UserScreen() {
            initComponents();
            UserDatenmodell ud = new UserDatenmodell(v);
            jTable1.setModel(ud);
            v.add(new UserTab());
            jTable1.updateUI();
     
     
        }
     
        /** 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() {
     
            zurueck = new javax.swing.JButton();
            jScrollPane1 = new javax.swing.JScrollPane();
            jTable1 = new javax.swing.JTable();
            update_button = new javax.swing.JButton();
     
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
     
            zurueck.setText("Zurück");
            zurueck.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    zurueckActionPerformed(evt);
                }
            });
     
            jTable1.setModel(new javax.swing.table.DefaultTableModel(
                new Object [][] {
     
                },
                new String [] {
     
                }
            ));
            jScrollPane1.setViewportView(jTable1);
     
            update_button.setText("Update");
     
            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(update_button)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 248, Short.MAX_VALUE)
                    .addComponent(zurueck)
                    .addContainerGap())
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
            );
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 237, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 47, Short.MAX_VALUE)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(zurueck)
                        .addComponent(update_button))
                    .addContainerGap())
            );
     
            pack();
        }// </editor-fold>
     
        private void zurueckActionPerformed(java.awt.event.ActionEvent evt) {
            LoggedIn li=new LoggedIn();
            li.setVisible(true);
            this.dispose();
        }
     
        /**
        * @param args the command line arguments
        */
        public static void main(String args[]) {
            java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    new UserScreen().setVisible(true);
                }
            });
        }
     
        // Variables declaration - do not modify
        private javax.swing.JScrollPane jScrollPane1;
        private javax.swing.JTable jTable1;
        private javax.swing.JButton update_button;
        private javax.swing.JButton zurueck;
        // End of variables declaration
     
    }


  2. #2
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    Default Re: own Tablemodel with checkbox

    Because you weren't using your custom model. It should be:

    jTable1.setModel(new UserDatenmodell());

  3. #3
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    Default Re: own Tablemodel with checkbox

    thanks for your post but i basically did that by setting the model to my vector.
    it does work perfectly if i don't use a boolean type, but i want a checkbox next to every row of my table.

  4. #4
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    Default Re: own Tablemodel with checkbox

    anyone any idea why it doesn't work? :/

    here is the exception thrown:

    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
            at javax.swing.JTable.prepareRenderer(JTable.java:5720)
            at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
            at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
            at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1770)
            at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
            at javax.swing.JComponent.paintComponent(JComponent.java:752)
            at javax.swing.JComponent.paint(JComponent.java:1029)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JViewport.paint(JViewport.java:747)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JLayeredPane.paint(JLayeredPane.java:567)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paintToOffscreen(JComponent.java:5131)
            at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1479)
            at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1410)
            at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
            at javax.swing.JComponent.paint(JComponent.java:1015)
            at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
            at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
            at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
            at java.awt.Container.paint(Container.java:1780)
            at java.awt.Window.paint(Window.java:3375)
            at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:796)
            at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
            at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
            at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
            at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
            at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
            at java.awt.EventQueue.access$000(EventQueue.java:85)
            at java.awt.EventQueue$1.run(EventQueue.java:603)
            at java.awt.EventQueue$1.run(EventQueue.java:601)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
            at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
            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)
    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
            at javax.swing.JTable.prepareRenderer(JTable.java:5720)
            at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
            at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
            at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1770)
            at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
            at javax.swing.JComponent.paintComponent(JComponent.java:752)
            at javax.swing.JComponent.paint(JComponent.java:1029)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JViewport.paint(JViewport.java:747)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paint(JComponent.java:1038)
            at javax.swing.JLayeredPane.paint(JLayeredPane.java:567)
            at javax.swing.JComponent.paintChildren(JComponent.java:862)
            at javax.swing.JComponent.paintToOffscreen(JComponent.java:5131)
            at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1479)
            at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1410)
            at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
            at javax.swing.JComponent.paint(JComponent.java:1015)
            at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
            at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
            at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
            at java.awt.Container.paint(Container.java:1780)
            at java.awt.Window.paint(Window.java:3375)
            at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:796)
            at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
            at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
            at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
            at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
            at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
            at java.awt.EventQueue.access$000(EventQueue.java:85)
            at java.awt.EventQueue$1.run(EventQueue.java:603)
            at java.awt.EventQueue$1.run(EventQueue.java:601)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
            at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
            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)
    Last edited by Voldimore; February 21st, 2012 at 06:29 AM.

  5. #5
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    Default Re: own Tablemodel with checkbox

    can no one tell me how to solve this issue?

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