dbmenu.java

这是和数据库连接有关的程序.如果有兴趣可以

/*
 * DBMenu.java
 *
 * Created on 2007年11月14日, 上午11:43
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package jdbcjframe;

/**
 *
 * @author user
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class DBMenu extends JMenu {
    
    /** Creates a new instance of DBMenu */
    
    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();
                if(menuListener!=null)menuListener.actionPerformed(event);
                } 
               }
             
}