Can't advance in different Jframe Form (Logger.getLogger method)

I added rs2xml and derby in my libraries, it was working at the start but after adding the connection for derby and refresh function for my Tables, the JFrame form can't proceed to the next JFrame Form

These are the codes to move to the next JFrame but it's not working but there is no errors

int confirmed = JOptionPane.showConfirmDialog(null,
"Are you sure you want to Continue to Stock Table?",
"Confirm Button Message Box",
JOptionPane.YES_NO_OPTION);
if (confirmed == JOptionPane.YES_OPTION) {
try {
new InformationofCafe().setVisible(true);
this.setVisible(false);
} catch (SQLException ex) {
Logger.getLogger(Menu.class.getName()).log(Level.SEVERE, null, ex);
}
} else {
JOptionPane.showMessageDialog(Menu.this, "Cancelled");
}       

and these are the codes in the JFrame form that I wish to get to but it won't advance to that JFrame form.

public class InformationofCafe extends javax.swing.JFrame {
    Connection con;
    Statement stmt;
    ResultSet rs;
    int cursorRow = 0;

    public InformationofCafe() throws SQLException {
        initComponents();
        DoConnect();
        update_table();
    }

    void update_table() throws SQLException {
        rs=stmt.executeQuery("SELECT * FROM STOCK");
        jTable.setModel(DbUtils.resultSetToTableModel(rs));
    }

    public Connection DoConnect() {
        try {
            String host ="jdbc:derby://localhost:1527//Downtown";
            String uName ="miguel";
            String uPass ="miguel";
            con = DriverManager.getConnection(host, uName, uPass);
            stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
                                       ResultSet.CONCUR_UPDATABLE );
            String sql = "SELECT * FROM STOCK";
            rs = stmt.executeQuery(sql);
            rs.next();
            int id_col = rs.getInt("ITEM");
            String id = Integer.toString(id_col);
            String description = rs.getString("DESCRIPTION");
            String amount = rs.getString("AMOUNT");

            TextItem.setText(id);
            TextDescription.setText(description);
            TextAmount.setText(amount);

            update_table();
        }
        catch (SQLException err) {
            JOptionPane.showMessageDialog(InformationofCafe.this,
                                          err.getMessage());
    }
    return con;
}

public static void main(String args[]) {
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                new InformationofCafe().setVisible(true);
            } catch (SQLException ex) {
                Logger.getLogger(InformationofCafe.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    });
}

I tried everything I knew. Even searched the Internet on what to do but can't seem to find the solution. I know it's the try and catch in logger.getlogger that's causing the error I just don't know how to fix it

here is the error log

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at activity3.InformationofCafe.update_table(InformationofCafe.java:33)
at activity3.InformationofCafe.<init>(InformationofCafe.java:29)
at activity3.Menu.InformationActionPerformed(Menu.java:130)
at activity3.Menu.access$000(Menu.java:23)
at activity3.Menu$1.actionPerformed(Menu.java:62)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
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:4525)
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)

Your question has nothing to do with Swing. And I also don't understand why you tagged it with sql-server since you state that you are using Derby.

You are failing to connect to the database, i.e. the following line of your code is throwing an exception.

con = DriverManager.getConnection(host, uName, uPass);

Subsequently, the stmt member of class InformationofCafe is not initialized and therefore is null.

The way your code handles the database connection error is to display the error message in a JOptionPane. That means your program continues to run and when it gets to the following line of your code, it throws NullPointerException because stmt is null.

rs=stmt.executeQuery("SELECT * FROM STOCK");

I suggest you write a simple program, without a GUI that tries to connect to Derby and then executes a SQL query. Once you get that right, you can fix the code in your GUI. Have you read the documentation for Derby?

You need to think about what you want your GUI program to do if there is a problem with connecting to the database or retrieving data from the database. You shouldn't just ignore it. And just displaying the error message is essentially ignoring the error.