Creating a Table withJDBC and SQL - Java Database Programming Bible - page 180

Listing 5-4: DBMenu (the base class for TableMenu)
package jdbc_bible.part2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class DBMenu extends JMenu{
JMenuItem dbItem;
JMenuItem newItem;
JMenuItem openItem;
JMenuItem exitItem;
ActionListener menuListener = null;
MenuItemListener itemListener = new MenuItemListener();
public DBMenu(){
}
public void enableMenuItem(String itemName,boolean enable){
Component c[] = getMenuComponents();
for(int i=0;i<c.length;i++){
if(c[i] instanceof JMenuItem){
JMenuItem menuItem = (JMenuItem)c[i];
if(menuItem.getText().equals(itemName))menuItem.setEnabled(enable);
}
}
}
public void setMenuListener(ActionListener menuListener){
this.menuListener = menuListener;
}
class MenuItemListener implements ActionListener{
public void actionPerformed(ActionEvent event){
String action = event.getActionCommand();