JAVA create JTable using Vector() and one class

Note: This example assumes that a connection class already exists. 

/**

 * Fields

 **/

     // Connection variables.

     Connection conn = null;

     PreparedStatement pst = null;

     static ResultSet rst = null;

     private Vector columnNames = new Vector();

     private Vector data = new Vector();

     private JTable tblData = new JTable();

     private DefaultTableModel model;

    

     private JPanel pnl_Data = new JPanel();

     …

     …                              

     …

/**

 *Constructor

 **/

public Class(){

     Connect_to_database ctb = new Connect_to_database();

     conn = ctb.ConnectDb();

    

     createTable();

     …

     …   

     …

    

     pnl_Data.setBorder(new TitledBorder(null, "Data", TitledBorder.CENTER, TitledBorder.TOP, null, Color.BLUE));

     pnl_Data.setBackground(Color.WHITE);

     pnl_Data.setBounds(570, 11, 636, 850);

     contentPane.add(pnl_Data);

}

/**

 * Load table Data Method

 **/

public void reloadData(){

     columnNames.clear();

     data.clear();

          

     try {

           String sql = "SELECT * FROM User_tb“;

          

           pst = conn.prepareStatement(sql);

           rst = pst.executeQuery();

           ResultSetMetaData md = rst.getMetaData();

           int columns = md.getColumnCount();

               

           for (int i = 1; i <= columns; i++) {

                columnNames.addElement( md.getColumnName(i) );

           } while (rst.next()) {

                Vector row = new Vector(columns);

                for (int i = 1; i <= columns; i++){

                     row.addElement( rst.getObject(i) );

                }

                data.addElement( row );

           }

           rst.close();

           pst.close();

     } catch (Exception e) {

           System.out.println("Error at reloadData()" + e);

     }

}

/**

 * Create table method

 **/

public void createTable() {

     reloadData();

               

     try {

           model = new DefaultTableModel(data, columnNames);

           tblData = new JTable(model);

                    

           tblData.setBounds(10, 829, 616, -802);

           JScrollPane scroll = new JScrollPane(tblData, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

           tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

           scroll.setBorder(null);

           tblData.setBorder(null);

           scroll.setPreferredSize(new Dimension(610, 809));

           pnl_Data.add(scrollCPL);

     } catch (Exception e) {

           System.out.println("Error at createTable()" + e);

     }

}

by: Michael Lashley