NullPtrException when reading JTextField

[Antony Amicone]

i have a jtextfield, and when i press a button, i should have a print that show me the value inserted in the textfield, but it doesnt run.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package desktopapplication1;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.table.*;
import java.net.*;
import java.sql.*;
/**
 *
 * @author Antonio
 */
public class TbEvent implements ActionListener {

    private JButton addButton;
    private JButton editButton;
    private JButton searchButton;
    private JButton removeButton;
    private JButton ingredientsButton;
    private JButton howToButton;
    private JButton emailButton;
    private String url;
    private Connection c;
    private JTable t;
    private String recipeName,recipeHowTo,dish,image;
    private int level,servings,timeToEat;
    private String ingredients[];
    private JTextField recipeNameField;
    private JComboBox dishField;
    private JSlider levelField;
    private JSpinner servingsField;
    private JSpinner timeToEatField;
    private String value;

    public void actionPerformed(ActionEvent event) {

        try{
            if ( event.getSource() == addButton ) {
                recipeName = recipeNameField.getText();
                //level = levelField.getValue();
                //servings = servingsField.getValue();
                //timeToEat = (int)timeToEatField.getValue();
                //dish = dishField.getSelectedItem().toString();
                value = recipeName.concat(" "+level);
                System.out.println("VALORE: "+value);
                //JOptionPane.showMessageDialog(addButton, image, value, JOptionPane.ERROR_MESSAGE);
            }
            else if ( event.getSource() == editButton ) { }
            else if ( event.getSource() == searchButton ) {

                url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
                url += "C:\\Database3.mdb;DriverID=22;READONLY=false";
                //url += "C:\\Documents and Settings\\Guest\\Desktop\\database_libri.mdb;DriverID=22;READONLY=false";
                //Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               // c = DriverManager.getConnection(url);
                addButton.setText("");
                addButton.setText("Connessione Avvenuta.\n");

                Statement statement = c.createStatement();
                String query = "SELECT * from Recipes";
                ResultSet rs = statement.executeQuery(query);
                ResultSetMetaData rsmd = rs.getMetaData();
                for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
                    t.setValueAt(rs.getString(1),i,0);
                    t.setValueAt(rs.getString(2),i,1);
                }
                while (rs.next()) {
                    for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
                         t.setValueAt(rs.getString(1),i,0);
                         t.setValueAt(rs.getNString(2),i,1);

                    }
                }



            }
            else if ( event.getSource() == removeButton ) { }
            else if ( event.getSource() == ingredientsButton ) { }
            else if ( event.getSource() == howToButton ) { }
            else if ( event.getSource() == emailButton ) { }

        }catch(Exception e){
           e.printStackTrace();
        }
    }


public TbEvent(JButton t1, JButton t2, JButton t3, JButton t4, JButton t5, JButton t7, JButton t8){
    addButton = t1;
    editButton = t2;
    searchButton = t3;
    removeButton = t4;
    ingredientsButton = t5;
    howToButton = t7;
    emailButton = t8;
}
public TbEvent(JButton t3, String out, Connection conn, JTable table) {
    searchButton = t3;
    url = out;
    c = conn;
    t = table;


}

}

[David O'Meara]

recipeNameField is never created

[Antony Amicone]

i create it there

/*
 * DesktopApplication1View.java
 */

package desktopapplication1;

import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;
import java.net.*;
import java.sql.*;

/**
 * The application's main frame.
 */
public class DesktopApplication1View extends FrameView {

    public DesktopApplication1View(SingleFrameApplication app) {
        super(app);

        initComponents();

        // status bar initialization - message timeout, idle icon and busy animation, etc
        ResourceMap resourceMap = getResourceMap();
        int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
        messageTimer = new Timer(messageTimeout, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
            }
        });
        messageTimer.setRepeats(false);
        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
            busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
        }
        busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
                statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
            }
        });
        idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
        statusAnimationLabel.setIcon(idleIcon);
        progressBar.setVisible(false);

        // connecting action tasks to status bar via TaskMonitor
        TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
        taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                if ("started".equals(propertyName)) {
                    if (!busyIconTimer.isRunning()) {
                        statusAnimationLabel.setIcon(busyIcons[0]);
                        busyIconIndex = 0;
                        busyIconTimer.start();
                    }
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(true);
                } else if ("done".equals(propertyName)) {
                    busyIconTimer.stop();
                    statusAnimationLabel.setIcon(idleIcon);
                    progressBar.setVisible(false);
                    progressBar.setValue(0);
                } else if ("message".equals(propertyName)) {
                    String text = (String)(evt.getNewValue());
                    statusMessageLabel.setText((text == null) ? "" : text);
                    messageTimer.restart();
                } else if ("progress".equals(propertyName)) {
                    int value = (Integer)(evt.getNewValue());
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(false);
                    progressBar.setValue(value);
                }
            }
        }); jTextField1_recipeName.setText("test");
        TbEvent handler = new TbEvent(jButton1_add,jButton2_edit,jButton3_search,jButton4_rem,jButton5_ingredients,jButton6_howto,jButton7_email);
        jButton1_add.addActionListener(handler);
        jButton2_edit.addActionListener(handler);
        jButton3_search.addActionListener(handler);
        jButton4_rem.addActionListener(handler);
        jButton5_ingredients.addActionListener(handler);
        jButton6_howto.addActionListener(handler);
        jButton7_email.addActionListener(handler);

        /*
         *
         * miocodice
         *
         */


    }

    @Action
    public void showAboutBox() {
        if (aboutBox == null) {
            JFrame mainFrame = DesktopApplication1.getApplication().getMainFrame();
            aboutBox = new DesktopApplication1AboutBox(mainFrame);
            aboutBox.setLocationRelativeTo(mainFrame);
        }
        DesktopApplication1.getApplication().show(aboutBox);
    }

    /** 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() {

        mainPanel = new javax.swing.JPanel();
        jToolBar1 = new javax.swing.JToolBar();
        jButton1_add = new javax.swing.JButton();
        jButton2_edit = new javax.swing.JButton();
        jButton3_search = new javax.swing.JButton();
        jButton4_rem = new javax.swing.JButton();
        jButton5_ingredients = new javax.swing.JButton();
        jButton6_howto = new javax.swing.JButton();
        jButton7_email = new javax.swing.JButton();
        jTextField1_recipeName = new javax.swing.JTextField();
        jComboBox1 = new javax.swing.JComboBox();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jSlider1_level = new javax.swing.JSlider();
        jLabel2 = new javax.swing.JLabel();
        jSpinner1_servings = new javax.swing.JSpinner();
        jSpinner2_time = new javax.swing.JSpinner();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        menuBar = new javax.swing.JMenuBar();
        javax.swing.JMenu fileMenu = new javax.swing.JMenu();
        jMenuItem1 = new javax.swing.JMenuItem();
        jMenuItem2 = new javax.swing.JMenuItem();
        javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
        javax.swing.JMenu helpMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
        statusPanel = new javax.swing.JPanel();
        javax.swing.JSeparator statusPanelSeparator = new javax.swing.JSeparator();
        statusMessageLabel = new javax.swing.JLabel();
        statusAnimationLabel = new javax.swing.JLabel();
        progressBar = new javax.swing.JProgressBar();
        jLabel1 = new javax.swing.JLabel();

        mainPanel.setName("mainPanel"); // NOI18N
        mainPanel.setPreferredSize(new java.awt.Dimension(1182, 332));

        jToolBar1.setFloatable(false);
        jToolBar1.setRollover(true);
        jToolBar1.setName("jToolBar1"); // NOI18N

        org.jdesktop.application.ResourceMap resourceMap =
                  org.jdesktop.application.Application.getInstance(desktopapplication1.DesktopApplication1.class).getContext().getResourceMap(DesktopApplication1View.class);
        jButton1_add.setFont(resourceMap.getFont("jButton1_add.font")); // NOI18N
        jButton1_add.setIcon(resourceMap.getIcon("jButton1_add.icon")); // NOI18N
        jButton1_add.setText(resourceMap.getString("jButton1_add.text")); // NOI18N
        jButton1_add.setFocusable(false);
        jButton1_add.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton1_add.setName("jButton1_add"); // NOI18N
        jButton1_add.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton1_add);

        jButton2_edit.setIcon(resourceMap.getIcon("jButton2_edit.icon")); // NOI18N
        jButton2_edit.setFocusable(false);
        jButton2_edit.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton2_edit.setLabel(resourceMap.getString("jButton2_edit.label")); // NOI18N
        jButton2_edit.setMaximumSize(new java.awt.Dimension(61, 73));
        jButton2_edit.setMinimumSize(new java.awt.Dimension(61, 73));
        jButton2_edit.setName("jButton2_edit"); // NOI18N
        jButton2_edit.setPreferredSize(new java.awt.Dimension(61, 73));
        jButton2_edit.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton2_edit);

        jButton3_search.setText(resourceMap.getString("jButton3_search.text")); // NOI18N
        jButton3_search.setFocusable(false);
        jButton3_search.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton3_search.setName("jButton3_search"); // NOI18N
        jButton3_search.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jButton3_search.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3_searchActionPerformed(evt);
            }
        });
        jToolBar1.add(jButton3_search);

        jButton4_rem.setText(resourceMap.getString("jButton4_rem.text")); // NOI18N
        jButton4_rem.setFocusable(false);
        jButton4_rem.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton4_rem.setName("jButton4_rem"); // NOI18N
        jButton4_rem.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton4_rem);

        jButton5_ingredients.setText(resourceMap.getString("jButton5_ingredients.text")); // NOI18N
        jButton5_ingredients.setFocusable(false);
        jButton5_ingredients.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton5_ingredients.setName("jButton5_ingredients"); // NOI18N
        jButton5_ingredients.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton5_ingredients);

        jButton6_howto.setText(resourceMap.getString("jButton6_howto.text")); // NOI18N
        jButton6_howto.setFocusable(false);
        jButton6_howto.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton6_howto.setName("jButton6_howto"); // NOI18N
        jButton6_howto.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton6_howto);

        jButton7_email.setText(resourceMap.getString("jButton7_email.text")); // NOI18N
        jButton7_email.setFocusable(false);
        jButton7_email.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
        jButton7_email.setName("jButton7_email"); // NOI18N
        jButton7_email.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
        jToolBar1.add(jButton7_email);

        jTextField1_recipeName.setText(resourceMap.getString("jTextField1_recipeName.text")); // NOI18N
        jTextField1_recipeName.setName("jTextField1_recipeName"); // NOI18N

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Pasta", "Fish", "Meat", "Sweet" }));
        jComboBox1.setName("jComboBox1"); // NOI18N

        jScrollPane1.setName("jScrollPane1"); // NOI18N

        jTable1.setAutoCreateRowSorter(true);
        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Recipes"
            }
        ) {
            Class[] types = new Class [] {
                java.lang.String.class
            };

            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }
        });
        jTable1.setColumnSelectionAllowed(true);
        jTable1.setName("jTable1"); // NOI18N
        jScrollPane1.setViewportView(jTable1);
        jTable1.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jTable1.getColumnModel().getColumn(0).setHeaderValue(resourceMap.getString("jTable1.columnModel.title0")); // NOI18N

        jSlider1_level.setMaximum(5);
        jSlider1_level.setMinimum(1);
        jSlider1_level.setSnapToTicks(true);
        jSlider1_level.setName("jSlider1_level"); // NOI18N

        jLabel2.setText(resourceMap.getString("jLabel2.text")); // NOI18N
        jLabel2.setName("jLabel2"); // NOI18N

        jSpinner1_servings.setName("jSpinner1_servings"); // NOI18N

        jSpinner2_time.setName("jSpinner2_time"); // NOI18N

        jLabel3.setText(resourceMap.getString("jLabel3.text")); // NOI18N
        jLabel3.setName("jLabel3"); // NOI18N

        jLabel4.setText(resourceMap.getString("jLabel4.text")); // NOI18N
        jLabel4.setName("jLabel4"); // NOI18N

        javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
        mainPanel.setLayout(mainPanelLayout);
        mainPanelLayout.setHorizontalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jSlider1_level, javax.swing.GroupLayout.DEFAULT_SIZE, 130, Short.MAX_VALUE)
                    .addComponent(jComboBox1, 0, 130, Short.MAX_VALUE)
                    .addComponent(jTextField1_recipeName, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 130, Short.MAX_VALUE)
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addComponent(jSpinner1_servings, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jLabel3)
                        .addGap(18, 18, 18)
                        .addComponent(jSpinner2_time)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel2)
                    .addComponent(jLabel4))
                .addGap(46, 46, 46)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 391, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
            .addComponent(jToolBar1, javax.swing.GroupLayout.DEFAULT_SIZE, 631, Short.MAX_VALUE)
        );
        mainPanelLayout.setVerticalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addComponent(jToolBar1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()
                        .addGap(36, 36, 36)
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jLabel2)
                            .addGroup(mainPanelLayout.createSequentialGroup()
                                .addComponent(jTextField1_recipeName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jSlider1_level, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jSpinner1_servings, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel3)
                            .addComponent(jLabel4)
                            .addComponent(jSpinner2_time, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 267, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );

        menuBar.setName("menuBar"); // NOI18N

        fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
        fileMenu.setName("fileMenu"); // NOI18N

        jMenuItem1.setText(resourceMap.getString("jMenuItem1.text")); // NOI18N
        jMenuItem1.setName("jMenuItem1"); // NOI18N
        fileMenu.add(jMenuItem1);

        jMenuItem2.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_P, java.awt.event.InputEvent.SHIFT_MASK));
        jMenuItem2.setText(resourceMap.getString("jMenuItem2.text")); // NOI18N
        jMenuItem2.setName("jMenuItem2"); // NOI18N
        fileMenu.add(jMenuItem2);

        javax.swing.ActionMap actionMap =
               org.jdesktop.application.Application.getInstance(desktopapplication1.DesktopApplication1.class).getContext().getActionMap(DesktopApplication1View.class, this);
        exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
        exitMenuItem.setName("exitMenuItem"); // NOI18N
        fileMenu.add(exitMenuItem);

        menuBar.add(fileMenu);

        helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
        helpMenu.setName("helpMenu"); // NOI18N

        aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
        aboutMenuItem.setName("aboutMenuItem"); // NOI18N
        helpMenu.add(aboutMenuItem);

        menuBar.add(helpMenu);

        statusPanel.setName("statusPanel"); // NOI18N

        statusMessageLabel.setName("statusMessageLabel"); // NOI18N

        statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N

        progressBar.setName("progressBar"); // NOI18N

        jLabel1.setText(resourceMap.getString("jLabel1.text")); // NOI18N
        jLabel1.setName("jLabel1"); // NOI18N

        javax.swing.GroupLayout statusPanelLayout = new javax.swing.GroupLayout(statusPanel);
        statusPanel.setLayout(statusPanelLayout);
        statusPanelLayout.setHorizontalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(statusPanelSeparator, javax.swing.GroupLayout.DEFAULT_SIZE, 631, Short.MAX_VALUE)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(statusMessageLabel)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 374, Short.MAX_VALUE)
                .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(statusAnimationLabel)
                .addContainerGap())
        );
        statusPanelLayout.setVerticalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addComponent(statusPanelSeparator, javax.swing.GroupLayout.PREFERRED_SIZE, 2, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addGroup(statusPanelLayout.createSequentialGroup()
                        .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(statusMessageLabel)
                            .addComponent(statusAnimationLabel)
                            .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(3, 3, 3))
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );

        setComponent(mainPanel);
        setMenuBar(menuBar);
        setStatusBar(statusPanel);
        setToolBar(jToolBar1);
    }// </editor-fold>

    private void jButton3_searchActionPerformed(java.awt.event.ActionEvent evt) {                                                
           // TODO add your handling code here:
    }                                               

    // Variables declaration - do not modify
    private javax.swing.JButton jButton1_add;
    private javax.swing.JButton jButton2_edit;
    private javax.swing.JButton jButton3_search;
    private javax.swing.JButton jButton4_rem;
    private javax.swing.JButton jButton5_ingredients;
    private javax.swing.JButton jButton6_howto;
    private javax.swing.JButton jButton7_email;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSlider jSlider1_level;
    private javax.swing.JSpinner jSpinner1_servings;
    private javax.swing.JSpinner jSpinner2_time;
    private javax.swing.JTable jTable1;
    private javax.swing.JTextField jTextField1_recipeName;
    private javax.swing.JToolBar jToolBar1;
    private javax.swing.JPanel mainPanel;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JProgressBar progressBar;
    private javax.swing.JLabel statusAnimationLabel;
    private javax.swing.JLabel statusMessageLabel;
    private javax.swing.JPanel statusPanel;
    // End of variables declaration

    private final Timer messageTimer;
    private final Timer busyIconTimer;
    private final Icon idleIcon;
    private final Icon[] busyIcons = new Icon[15];
    private int busyIconIndex = 0;

    private JDialog aboutBox;

    private Connection conn;
    private String url;

   
}

[Antony Amicone]

and i added another modifier

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package desktopapplication1;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.table.*;
import java.net.*;
import java.sql.*;
/**
 *
 * @author Antonio
 */
public class TbEvent implements ActionListener {

    private JButton addButton;
    private JButton editButton;
    private JButton searchButton;
    private JButton removeButton;
    private JButton ingredientsButton;
    private JButton howToButton;
    private JButton emailButton;
    private String url;
    private Connection c;
    private JTable t;
    private String recipeName,recipeHowTo,dish,image;
    private int level,servings,timeToEat;
    private String ingredients[];
    private JTextField recipeNameField;
    private JComboBox dishField;
    private JSlider levelField;
    private JSpinner servingsField;
    private JSpinner timeToEatField;
    private String value;

    public void actionPerformed(ActionEvent event) {

        try{
            if ( event.getSource() == addButton ) {
                recipeName = recipeNameField.getText();
                level = levelField.getValue();
                //servings = servingsField.getValue();
                //timeToEat = (int)timeToEatField.getValue();
                dish = dishField.getSelectedItem().toString();
                value = recipeName.concat(" "+level);
                System.out.println("VALORE: "+value);
                //JOptionPane.showMessageDialog(addButton, image, value, JOptionPane.ERROR_MESSAGE);
            }
            else if ( event.getSource() == editButton ) { }
            else if ( event.getSource() == searchButton ) {

                url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
                url += "C:\\Database3.mdb;DriverID=22;READONLY=false";
                //url += "C:\\Documents and Settings\\Guest\\Desktop\\database_libri.mdb;DriverID=22;READONLY=false";
                //Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               // c = DriverManager.getConnection(url);
                addButton.setText("");
                addButton.setText("Connessione Avvenuta.\n");

                Statement statement = c.createStatement();
                String query = "SELECT * from Recipes";
                ResultSet rs = statement.executeQuery(query);
                ResultSetMetaData rsmd = rs.getMetaData();
                for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
                    t.setValueAt(rs.getString(1),i,0);
                    t.setValueAt(rs.getString(2),i,1);
                }
                while (rs.next()) {
                    for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
                         t.setValueAt(rs.getString(1),i,0);
                         t.setValueAt(rs.getNString(2),i,1);

                    }
                }



            }
            else if ( event.getSource() == removeButton ) { }
            else if ( event.getSource() == ingredientsButton ) { }
            else if ( event.getSource() == howToButton ) { }
            else if ( event.getSource() == emailButton ) { }

        }catch(Exception e){
           e.printStackTrace();
        }
    }


public TbEvent(JButton t1, JButton t2, JButton t3, JButton t4, JButton t5, JButton t7, JButton t8){
    addButton = t1;
    editButton = t2;
    searchButton = t3;
    removeButton = t4;
    ingredientsButton = t5;
    howToButton = t7;
    emailButton = t8;
}
public TbEvent(JButton t3, String out, Connection conn, JTable table) {
    searchButton = t3;
    url = out;
    c = conn;
    t = table;
}
[b]
public TbEvent(JButton t1, JTextField tf1, JComboBox tf2, JSlider tf3, JSpinner tf4, JSpinner tf5){
    addButton = t1;
    recipeNameField = tf1;
    dishField = tf2;
    levelField = tf3;
    servingsField = tf4;
    timeToEatField = tf5;
}[/b]
}

[fred rosenberger]

do you really expect someone to go through your almost 600 lines of code? And as Dave said, you never create recipeNameField. The ONLY place I see it is on line 112 of your TbEvent class in the "public TbEvent(JButton t1, JTextField tf1, JComboBox tf2, JSlider tf3, JSpinner tf4, JSpinner tf5)" constructor...but it's never declared anywhere.

[Antony Amicone]

looool i was tired, stupid error ty a lot
i solved

[Rob Spoor]

Next time please limit your code to an SSCCE. With this amount of code I didn't even bother looking at it.