NullPointerException при виводе БД в jTable

 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
       DBConnection Z=new DBConnection();
       Z.Conect();
       ResultSet Y = Z.GetDataSet();
        try {
             
            jTable1.setModel(DbUtils.resultSetToTableModel(Y));
        } catch (Exception e) {
            System.out.println(e.fillInStackTrace());
        }
    }

 public static void main(String args[]) {
        
      
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Forma().setVisible(true);
                DBConnection Z=new DBConnection();
                Z.Conect();
            }
        }

import java.sql.*;
 
public class DBConnection {
  private Statement s;
  public Connection Conn = null;
  public void Conect() {
      
      try {
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection connection = DriverManager.getConnection("jdbc:odbc:Oblik_koshtiv1");
    
           
            System.out.println("Підключення до БД здійснено");         
        } catch (SQLException e) {
            System.err.println("Неможливо підключитися до БД");
           
        } catch (Exception we) {
            we.fillInStackTrace();
 
        }
      
    }
 
  public ResultSet GetDataSet() {
        
        ResultSet rs = null;
        try {
            if (s == null) {
                s = ((Statement) Conn.createStatement());
            }
            rs = s.executeQuery("SELECT rahunok.Рахунок FROM rahunok;");
            return rs;
        } catch (Exception ex) {
            System.out.println(ex.fillInStackTrace());
            
        }
        return rs;
    }
}

ava.lang.NullPointerException
java.lang.NullPointerException
java.lang.IllegalArgumentException: Cannot set a null TableModel
    at net.proteanit.sql.DbUtils.resultSetToTableModel(DbUtils.java:16)
    at Forma.jButton1ActionPerformed(Forma.java:127)
    at Forma.access$000(Forma.java:6)
    at Forma$1.actionPerformed(Forma.java:46)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
    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:6505)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:682)
    at java.awt.EventQueue$3.run(EventQueue.java:680)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:696)
    at java.awt.EventQueue$4.run(EventQueue.java:694)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)