Most simple code to populate JTable from ResultSet

I googled the whole day and no luck. I call getnPrintAllData() method after pressing OK button. So the code is:

public class DatabaseSQLiteConnection {
     Connection conn = null;
     PreparedStatement statement = null;
     ResultSet res = null;
 
     public DatabaseSQLiteConnection(){
         try{
             Class.forName("org.sqlite.JDBC");
             conn = DriverManager.getConnection("jdbc:sqlite:test.sqlite");
             statement = conn.prepareStatement("SELECT * from product_info;");
         }
         catch(Exception e){
             e.printStackTrace();
         }
     }   
 
     public void getnPrintAllData(){
         String name, supplier, id;
         DefaultTableModel dtm = new DefaultTableModel();
         Window gui = new Window(); //My JPanel class        
         try{
             res = statement.executeQuery();
             testResultSet(res);
             ResultSetMetaData meta = res.getMetaData();
             int numberOfColumns = meta.getColumnCount();
             while (res.next())
             {
                 Object [] rowData = new Object[numberOfColumns];
                 for (int i = 0; i < rowData.length; ++i)
                 {
                     rowData[i] = res.getObject(i+1);
                 }
                 dtm.addRow(rowData);
             }
             gui.jTable1.setModel(dtm);
             dtm.fireTableDataChanged();
             //////////////////////////
 
         }
         catch(Exception e){
             System.err.println(e);
             e.printStackTrace();
         }
         finally{
             try{
                 res.close();
                 statement.close();
                 conn.close();
             }
             catch(Exception e){
                 e.printStackTrace();
             }
         }
     }    
 
     public void testResultSet(ResultSet res){
         try{
             while(res.next()){
                 System.out.println("Product ID: "+ res.getInt("product_id"));
                 System.out.println("Product name: "+ res.getString("product_name"));
                 System.out.println("Supplier: "+ res.getString("supplier"));
             }        
         }
         catch(Exception e){
             e.printStackTrace();
         }
     }
 }
 

My testResultSet() method is working properly.
Now, how to change my code so that it works, or what is the most simple code to make DefaultTableModel from ResultSet ?
Thanks in advance.

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