Создание универсального класса для таблиц

package aids.db.table;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.table.AbstractTableModel;
import aids.db.connect.ConnToDb;
 
public class DefTable extends AbstractTableModel {
public ResultSet rs = null;
int rowCount = 0;
int columnCount = 0;
 
 
public DefTable (String tableName) { //вводится название таблицы
connect(tableName);
}
 
private ResultSet connect(String tableName) {
try {
Connection con = ConnToDb.CreatingConnector();
Statement st = con.createStatement();
rs = st.executeQuery("select * from " + tableName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
 
}
 
@Override
public int getColumnCount() {
try {
columnCount = rs.getMetaData().getColumnCount();
} catch (SQLException e) {
e.printStackTrace();
}
 
return columnCount;
}
 
@Override
public int getRowCount() {
try {
while(rs.next()) {
rowCount++;
}
} catch (SQLException e) {
e.printStackTrace();
}
return rowCount;
}
 
 
@Override
public Object getValueAt(int row, int column) {
Object [][] ob = null;
try {
 
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ob[row][column];
}
 
/*Выбор названий колонок*/
@Override
public String getColumnName(int columnIndex) {
String colName = null;
try {
for (int i = 1; i < rs.getMetaData().getColumnCount(); i++){
colName = rs.getMetaData().getColumnName(columnIndex+1);    
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("col = "+colName);
return colName;
}
 
@Override
public void setValueAt(Object ob, int arg1, int arg2) {
}
 
}
 
класс c методом main():
 
package aids.db.win;
 
import java.awt.BorderLayout;
 
public class Golovna extends Visual {
 
private JPanel pNavig = new JPanel();
private JPanel pNorth = new JPanel();
private JPanel pCenter = new JPanel();
private BorderLayout bl = new BorderLayout();
private FlowLayout bl_pNorth = new FlowLayout();
private JButton bEdit = new JButton("Редактировать");
private JButton bNew = new JButton("Новый");
private JComboBox cbOtdel = new JComboBox();
private JLabel label = new JLabel();
private DefTable dfSkrin = new DefTable("User"); //ВОТ ЗДЕСЬ ВВОДИТСЯ НАЗВАНИЕ С ТАБЛИЦЫ
private JTable S_table;
 
public Golovna() {
super("Вход");
setTitle("Главное окно");
addToGolovna();
}
 
private void addToGolovna() {
try {
Connection con = ConnToDb.CreatingConnector();
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("Select D_name from Department");
while(rs.next()){
cbOtdel.addItem(rs.getString(1));
}
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (SQLException e1) {
e1.printStackTrace();
}
 
this.getContentPane().setLayout(bl);
this.getContentPane().setBackground(SystemColor.activeCaptio nText);
this.setSize(new Dimension(784, 672));
this.getContentPane().add(pCenter, BorderLayout.CENTER);
this.getContentPane().add(pNorth, BorderLayout.NORTH);
this.getContentPane().add(pNavig, BorderLayout.WEST);
 
pCenter.setLayout(null);
 
pNorth.setLayout(bl_pNorth);
pNorth.setPreferredSize(new Dimension(700, 40));
pNorth.setBackground(new Color(0, 0, 153));
 
pNavig.setLayout(null);
pNavig.setPreferredSize(new Dimension(250, 500));
pNavig.setBackground(new Color(0, 0, 204));
 
bNew.setVerticalAlignment(SwingConstants.BOTTOM);
bNew.setForeground(new Color(240, 255, 255));
bNew.setFocusPainted(false);
bNew.setBackground(new Color(30, 144, 255));
bNew.setBorder(new EmptyBorder(0, 0, 0, 0));
bNew.setMaximumSize(new Dimension(100, 120));
bNew.setFont(new Font("Garamond", Font.PLAIN, 12));
bNew.setAlignmentX(Component.CENTER_ALIGNMENT);
bNew.setBounds(5, 76, 235, 45);
 
bEdit.setVerticalAlignment(SwingConstants.BOTTOM);
bEdit.setBorder(new EmptyBorder(0, 0, 0, 0));
bEdit.setForeground(new Color(240, 255, 255));
bEdit.setBackground(new Color(32, 178, 170));
bEdit.setAlignmentX(Component.CENTER_ALIGNMENT);
bEdit.setFocusPainted(false);
bEdit.setFont(new Font("Garamond", Font.PLAIN, 12));
bEdit.setBounds(5, 132, 235, 45);
 
label.setBounds(5, 5, 235, 20);
label.setAlignmentX(Component.CENTER_ALIGNMENT);
label.setText("");
label.setForeground(SystemColor.window);
label.setFont(new Font("Garamond", Font.PLAIN, 20));
 
cbOtdel.setSelectedIndex(-1);
cbOtdel.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CUR SOR));
cbOtdel.setIgnoreRepaint(false);
cbOtdel.setInheritsPopupMenu(true);
cbOtdel.setLightWeightPopupEnabled(false);
cbOtdel.setBounds(5, 30, 235, 35);
cbOtdel.setBackground(new Color(0, 0, 204));
cbOtdel.setFont(new Font("Garamond", Font.BOLD, 18));
cbOtdel.setFocusable(false);
cbOtdel.setForeground(new Color(240, 255, 255));
cbOtdel.setBorder(new LineBorder(new Color(0, 0, 153), 0));
cbOtdel.setMaximumSize(new Dimension(1000, 30));
 
 
cbOtdel.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
if(e.getStateChange() == 1){    
pCenter.repaint();
}
}
});
 
S_table = new JTable(dfSkrin);
S_table.setFillsViewportHeight(true);
 
JScrollPane sp = new JScrollPane(S_table);
sp.setBounds(5, 15, 400, 400);
sp.setViewportView(S_table);
sp.setColumnHeaderView(S_table);
 
pCenter.add(sp);
pCenter.repaint();
 
pNavig.add(label);
pNavig.add(cbOtdel);
pNavig.add(bNew);
pNavig.add(bEdit);
 
this.setLocationRelativeTo(null);
this.setVisible(true);
}
 
 
 
public static void main(String[] args) {
new Golovna();
}
}