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);
}
}