[asenodin]

Hi,

ich habe ein Problem was ich nicht beheben kann und auch nicht weiß woran es liegen könnte. habe semtliche tuts durch genommen habe auch alles so gemacht wie es dort steht und es passiert nichts.

Ich habe ein DesktopPane und adde mehrer InternalFrames. Das Problem ist das er nichts anzeigt außer ein Fehler.

PHP-Code:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.JInternalFrame.show(JInternalFrame.java:1642)
        at java.awt.Component.show(Component.java:1300)
        at java.awt.Component.setVisible(Component.java:1253)
        at javax.swing.JComponent.setVisible(JComponent.java:2535)
        at clientContent.ClientList.initComponents(ClientList.java:51)
        at clientContent.ClientList.<init>(ClientList.java:23)
        at frames.AdminFrame.actionPerformed(AdminFrame.java:234)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
        at java.awt.Component.processMouseEvent(Component.java:5488)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
        at java.awt.Component.processEvent(Component.java:5253)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110) 


[Corvin]

http://java.sun.com/j2se/1.5.0/docs/...Exception.html

NullPointerException
Thrown when an application attempts to use null in a case where an object is required. These include:

* Calling the instance method of a null object.
* Accessing or modifying the field of a null object.
* Taking the length of null as if it were an array.
* Accessing or modifying the slots of null as if it were an array.
* Throwing null as if it were a Throwable value.

Applications should throw instances of this class to indicate other illegal uses of the null object.

Ansonsten.. zeig mal dein Code.

[asenodin]

Einmal die Klasse wo ich Desktop Pane erstelle und InternalFrame aufrufe

PHP-Code:

/*
 * MainFrame.java
 *
 * Created on 28. November 2006, 20:12
 *
 */

package frames;

/**
 *
 * @author Gentleman
 *
 */

import java.awt.*;
import java.awt.event.*;
import java.awt.Component.*;
import clientContent.*;
import mealContent.*;
import javax.swing.*;
import helpContent.*;
import helpContent.*;
import mainDialog.*;
import java.io.*;
import java.net.*;

public class AdminFrame extends JFrame implements ActionListener {
    private JMenuBar menuB_main = new JMenuBar();
    
    private JMenu menu_data = new JMenu("Datei");
    private JMenuItem menuI_close = new JMenuItem("Schließen");
    private JMenuItem menuI_quit = new JMenuItem("Beenden");
    
    private JMenu menu_Client = new JMenu("Kunde");
    private JMenuItem menuI_clientList = new JMenuItem("Kunden Liste");
    private JMenuItem menuI_newClient = new JMenuItem("Kunde Neu");
    private JMenuItem menuI_changeClient = new JMenuItem("Kundenstamm");
    private JMenuItem menuI_searchClient = new JMenuItem("Kunde Suchen");
    
    private JMenu menu_Meal = new JMenu("Lebensmittel");
    private JMenuItem menuI_mealList = new JMenuItem("Lebensmittel Liste");
    private JMenuItem menuI_newMeal = new JMenuItem("Lebensmittel Neu");
    private JMenuItem menuI_changeMeal = new JMenuItem("Lebensmittelstamm");
    private JMenuItem menuI_searchMeal = new JMenuItem("Lebensmittel Suchen");
    
    private JMenu menu_search = new JMenu("Search");
    private JMenuItem menuI_sClient = new JMenuItem("Kunden");
    private JMenuItem menuI_sMeal = new JMenuItem("Lebensmittel");
    
    private JMenu menu_list = new JMenu("Listen");
    private JMenuItem menuI_lClient = new JMenuItem("Kundestamm");
    private JMenuItem menuI_lMeal = new JMenuItem("Nahrungstabelle");
    
    private JMenu menu_calc = new JMenu("Nährwertberechner");
    private JMenuItem menuI_newCalc = new JMenuItem("Neu");
    
    private JMenu menu_help = new JMenu("Hilfe");
    private JMenuItem menuI_faq = new JMenuItem("FAQ");
    private JMenuItem menuI_manual = new JMenuItem("Benutzerhandbuch");
    private JMenuItem menuI_contact = new JMenuItem("Kontakt");
    private JMenuItem menuI_about = new JMenuItem("About");
    
    private JLabel label_title = new JLabel();
    private JLabel label_status = new JLabel();
    private JLabel label_desc = new JLabel("Beschreibung");
    
    private JPanel panel_west = new JPanel();    
    private JPanel panel_east = new JPanel();
    private JPanel panel_south = new JPanel();
    private JPanel panel_center = new JPanel();
    
    private JDesktopPane desktop = new JDesktopPane();
    
    private JScrollPane jScrollPane1 = new JScrollPane();
    private JEditorPane txta_desc = new JEditorPane();
    
    private JEditorPane txta_welcome = new JEditorPane();    
    private JScrollPane jScrollPane11 = new JScrollPane();
    
    private JProgressBar progBar = new JProgressBar();
    
    private JInternalFrame internFrame = new JInternalFrame("Welcome", true, true, true, true);
    
    private Dimension dim;
    
    private Welcome wel = new Welcome();    
    
     /*
      * Creates a new instance of MainFrame      
      */
    public AdminFrame(String name) {
        setFrame();
        setMenuBar();
        setTitle(name);
    }
    
    public AdminFrame() {
        setTitle("Ernährungsberater");
        setMenuBar();
        setFrame();        
    }
    
    /**
     *Hier wird die Fenstergröße erstellt
     */
    public void setFrameSize() {
        dim = Toolkit.getDefaultToolkit().getScreenSize();
        setSize(dim.width - 10, dim.height - 35);
        setLocation( (dim.width - getSize().width ) / 2,  (dim.height- getSize().height) / 2 - 20);
    }
    
    public void setFrame() {
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                System.exit(0); }});
                
                setFrameSize(); 

//                setLayout(new BorderLayout());
                             
//                label_title.setFont(new Font("Arial", Font.ROMAN_BASELINE, 18));
//                label_title.setHorizontalTextPosition(SwingConstants.CENTER);
//                
//                panel_east.setLayout(new BorderLayout());
//                jScrollPane11.setViewportView(txta_welcome);
//                
//                jScrollPane1.setViewportView(txta_desc);
//                txta_desc.setEditable(false);
//                label_desc.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
//                panel_east.add(jScrollPane1);
//                panel_east.add(label_desc, BorderLayout.NORTH);
//                
//                panel_south.setLayout(new GridLayout(1,1));
//                panel_south.add(progBar, BorderLayout.SOUTH);
                
                getContentPane().add(desktop, BorderLayout.CENTER);
                desktop.add(wel, JLayeredPane.DEFAULT_LAYER);
                             
//                txta_welcome.setEditable(false);
//                txta_welcome.setBorder(null);
//                internFrame.add(txta_welcome);
//                desktop.add(internFrame);
//                desktop.add(txta_welcome);              
                
//                add(desktop, BorderLayout.CENTER);
//                add(label_title, BorderLayout.NORTH);
//                add(panel_south, BorderLayout.SOUTH);
//                add(panel_east, BorderLayout.EAST);
    }
    
    public void setMenuBar() {
        setJMenuBar(menuB_main);
        
        menuB_main.add(menu_data);
        menu_data.add(menuI_close);
        menuI_close.addActionListener(this);
        menu_data.addSeparator();
        menu_data.add(menuI_quit);
        menuI_quit.addActionListener(this);
        
        menuB_main.add(menu_Client);
        menu_Client.add(menuI_newClient);
        menuI_newClient.addActionListener(this);
        menu_Client.add(menuI_clientList);
        menuI_clientList.addActionListener(this);
        menu_Client.add(menuI_changeClient);
        menuI_changeClient.addActionListener(this);
        
        menuB_main.add(menu_Meal);
        menu_Meal.add(menuI_newMeal);
        menuI_newMeal.addActionListener(this);
        menu_Meal.add(menuI_mealList);
        menuI_mealList.addActionListener(this);
        menu_Meal.add(menuI_changeMeal);
        menuI_changeMeal.addActionListener(this);
        
        menuB_main.add(menu_calc);
        menu_calc.add(menuI_newCalc);
        menuI_newCalc.addActionListener(this);
        
        menuB_main.add(menu_help);
        menu_help.add(menuI_manual);
        menuI_manual.addActionListener(this);
        menu_help.add(menuI_faq);
        menuI_faq.addActionListener(this);
        menu_help.add(menuI_contact);
        menuI_contact.addActionListener(this);
        menu_help.add(menuI_about);
        menuI_about.addActionListener(this);
        
        /**
         * menuB_main.add(menu_list);
         * menu_list.add(menuI_newClient);
         * menuI_newClient.addActionListener(this);
         * menu_list.add(menuI_lMeal);
         * menuI_lMeal.addActionListener(this);
         */
        
        /**
         * menuB_main.add(menu_search);
         * menu_search.add(menuI_sClient);
         * menuI_sClient.addActionListener(this);
         * menu_search.add(menuI_sMeal);
         * menuI_sMeal.addActionListener(this);
         */
    }
    
    private void clearPanelCenter() {
        desktop.removeAll();
    }
    
    private void refreshPanelCenter() {
        validate();
        repaint();        
    }
    
    public void actionPerformed(ActionEvent ae) {
        Object event = ae.getSource();
        
        if(event == menuI_newCalc) {
            NewNutrientCalc nnc = new NewNutrientCalc();
            desktop.add(nnc);    
        }
        
        if(event == menuI_newClient) {
//            clearPanelCenter();
            NewClient newC = new NewClient();
            desktop.add(newC, JLayeredPane.DEFAULT_LAYER);
        }
        
        if(event == menuI_clientList) {
//            clearPanelCenter();
            ClientList cl = new ClientList();
            desktop.add(cl);
        }
        
        if(event == menuI_changeClient) {
//            clearPanelCenter();
            ClientChange cl = new ClientChange();
            desktop.add(cl);
        }
        
        
        if(event == menuI_manual) {
//            clearPanelCenter();
            ReadMe rm = new ReadMe();
            desktop.add(rm);
//            refreshPanelCenter();
        }
        
        if(event == menuI_mealList) {
//            clearPanelCenter();
            MealList ml = new  MealList();
            desktop.add(ml);
//            refreshPanelCenter();
        }
        if(event == menuI_newMeal) {
//            clearPanelCenter();
            NewMeal nm = new  NewMeal();
            desktop.add(nm);
//            refreshPanelCenter();
        }
        
        if(event == menuI_changeMeal) {
//            clearPanelCenter();
            ChangeMeal cm = new  ChangeMeal();
            desktop.add(cm);
//            refreshPanelCenter();
        }
        
        if(event == menuI_contact) {
//            clearPanelCenter();
            Contakt co = new  Contakt();
            desktop.add(co);
//            refreshPanelCenter();
        }
        
        if(event == menuI_about) {
//            clearPanelCenter();
            About ab = new About();
            desktop.add(ab);
//            refreshPanelCenter();
        }
        
        if(event == menuI_close) {
            desktop.removeAll();
            desktop.repaint();
        }
        
        if(event == menuI_quit) {
            System.exit(0);
        }
    }
    
    public static void main(String args[]) {
        AdminFrame af = new AdminFrame();
        af.setVisible(true);
    }
} 


[pago]

Das Problem liegt in der ClientList-Klasse, genauer gesagt in der initComponents-Methode.

[asenodin]

was soll ich da jetzt machen? Ich meine das kann man doch beheben oder nicht?

PHP-Code:

private void initComponents() {
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jPanel1 = new javax.swing.JPanel();
        btn_print = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        getContentPane().setLayout(new java.awt.BorderLayout(1, 2));

        setClosable(true);
        setIconifiable(true);
        setMaximizable(true);
        setResizable(true);
        setTitle("Kundenstamm");
        setDesktopIcon(null);
        setMinimumSize(new java.awt.Dimension(800, 600));
        setOpaque(false);
        setPreferredSize(new java.awt.Dimension(800, 600));
        setVisible(true);
        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null, null, null, null, null, null}
            },
            new String [] {
                "Kundennummer", "Vorname", "Nachname", "Strasse", "Postleitzahl", "Wohnort", "Telefonnummer", "Handynummer", "E-Mail Adresse"
            }
        ) {
            Class[] types = new Class [] {
                java.lang.Integer.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class
            };
            boolean[] canEdit = new boolean [] {
                false, false, false, false, false, false, false, false, false
            };

            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(jTable1);

        getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);

        btn_print.setText("Drucken");
        btn_print.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_printActionPerformed(evt);
            }
        });

        jPanel1.add(btn_print);

        getContentPane().add(jPanel1, java.awt.BorderLayout.SOUTH);

        jLabel1.setFont(new java.awt.Font("Arial", 0, 18));
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("Kundenliste");
        getContentPane().add(jLabel1, java.awt.BorderLayout.NORTH);

    }// </editor-fold> 


das ist die methode. aber selbst wenn ich das nicht auswähle erscheint nichts.

[pago]

setDesktopIcon(null);

Das da ist böse und mit Sicherheit nicht das, was du willst.

[asenodin]

ja ganz toll wie bekomm ich das weg? man kann bei netbeans den code nicht verändern jedenfall nicht das was generiert wurde.

und außerdem besteht der fehler immer noch. es wird nicht hinzugefügt.