JAVA GUI学习 - JTable表格组件学习_C ***

 /**
  * JTable高级应用
  * @author Wfei
  *
  */
 public class JTableKnow_C extends JFrame
 {
     JTable jTable;
     MyJMenuItem jMenuItem;
     MyJMenuItem jMenuItem2;
     JPopupMenu jPopupMenu;
     JMenu jMenu;
     public JTableKnow_C()
     {
         this.setBounds(300, 100, 400, 300);
         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         Object[][] tableData = new Object[3][4];
         tableData[0] = new Object[]{"1-1","1-2","左",true};
         tableData[1] = new Object[]{"2-1","2-2","右",false};
         tableData[2] = new Object[]{"3-1","3-2","左",true};
         Object[] tableColName = new Object[]{"第一列名","第二列名","第三列名","第四列名"};
         //创建表格模型
         DefaultTableModel defaultTableModel = new DefaultTableModel(tableData,tableColName);
         //实例化表格
         jTable = new JTable(defaultTableModel)
         {
             /**
              * 判断某一列是否为boolean类型，如果是：以复选框显示
              */
             @Override
             public Class<?> getColumnClass(int column)
             {
                 // TODO Auto-generated method stub
                 return jTable.getValueAt(0, column).getClass();
             }
             /**
              * 设置某一行、某一列、或某个单元格是否可编辑
              */
             @Override
             public boolean isCellEditable(int row, int column)
             {
                 // TODO Auto-generated method stub
                 if (row == 1 && column == 1)
                 {
                     return false;
                 }
                 else {
                     return true;
                 }
             }
             //表格的标题，必须配合滚动面板一起使用才能显示出来
         };
         //实例化滚动面板
         JScrollPane jScrollPane = new JScrollPane(jTable);
         this.add(jScrollPane);

         jPopupMenu = new JPopupMenu();
         jMenu = new JMenu("更改为：");
         jMenuItem = new MyJMenuItem("左",1);
         jMenuItem2 = new MyJMenuItem("右",1);
         jPopupMenu.add(jMenu);
         jMenu.add(jMenuItem);jMenu.add(jMenuItem2);

         jTable.setComponentPopupMenu(jPopupMenu);
         jPopupMenu.addPopupMenuListener(new PopupMenuListener()
         {
             /**
              * 设置个性化显示菜单的监听事件
              */
             @Override
             public void popupMenuWillBecomeVisible(PopupMenuEvent e)
             {
                 int index = jTable.getSelectedRow();
                 if (index != -1)
                 {
                     String str = jTable.getValueAt(index, 2).toString();
                     if (str.equals("左"))
                     {
                         jMenuItem.setVisible(false);
                         jMenuItem2.setVisible(true);
                     }
                     else {
                         jMenuItem.setVisible(true);
                         jMenuItem2.setVisible(false);
                     }
                 }
             }
             @Override
             public void popupMenuWillBecomeInvisible(PopupMenuEvent e)
             {
             }
             @Override
             public void popupMenuCanceled(PopupMenuEvent e)
             {
             }
         });
         //为菜单的每个jMenuItem加上监听器
 //        addListenerToJMenuItem(jMenu);
     }
 //    public void addListenerToJMenuItem(Container container)
 //    {
 //        for (Component component : container.getComponents())
 //        {
 //            if (component == JMenuItem.class)
 //            {
 //                System.out.println("1111111");
 //                JMenuItem jMenuItem = (JMenuItem) component;
 //                jMenuItem.addActionListener(new MenuItemListener());
 //            }
 //            else {
 //                System.out.println("2222222");
 //                JMenu jMenu = (JMenu) component;
 //                addListenerToJMenuItem(jMenu);
 //            }
 //        }
 //    }
     /**
      * 菜单项监听器
      * @author Administrator
      *
      */
     private class MenuItemListener implements ActionListener
     {

         @Override
         public void actionPerformed(ActionEvent e)
         {
             JMenuItem item = (JMenuItem)e.getSource();
             // TODO Auto-generated method stub
             //JOptionPane.showMessageDialog(null, item.getText());
             //判断是否有选中项
             if(jTable.getSelectedRow() != -1)
             {
                 //判断按钮
                 if (item == jMenuItem)
                 {
                     JOptionPane.showMessageDialog(null, "已更改为：右");
                 }
                 else {
                     JOptionPane.showMessageDialog(null, "已更改为：左");
                 }
             }
             else
             {
                 JOptionPane.showMessageDialog(null, "请选择修改的用户");
             }
         }

     }
     public static void main(String[] args)
     {
         JTableKnow_C jTableKnowC = new JTableKnow_C();
         jTableKnowC.setVisible(true);
     }
 }