java 更换皮肤问题Cannot refer to a nonfinal variable inside an inner class defined in a different method

遇到一个很奇怪的错误，想为动态生成的菜单项增加事件处理。大致代码如下：

public class MainMenu extends JFrame implements ActionListener{

    private String[] themes={"SubstanceAutumnLookAndFeel","SubstanceBusinessLookAndFeel"};

    public  MainMenu()
    {
      String[] themes={"SubstanceAquaTheme","SubstanceBarbyPinkTheme"};
        JMenuItem[] menuItems=new JMenuItem[themes.length];
        for( int i=0;i<themes.length;i++)
        {
            
            menuItems[i]=new JMenuItem(themes[i]);
            skinMenu.add(menuItems[i]);
            menuItems[i].addActionListener(
                    new ActionListener()
                    {
                        int type=i;报错
                        public void actionPerformed(ActionEvent e)
                        {
                            changeSkin(type);
                        }
                    });
                    
        }
  }

 public void changeSkin(int  type)
        {
      
             
                    try {
                        UIManager.setLookAndFeel("org.jvnet.substance.skin."+themes[type]);
                    } catch (ClassNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (InstantiationException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (UnsupportedLookAndFeelException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    SwingUtilities.updateComponentTreeUI(this);
             
        }
       

}

Cannot refer to a non-final variable inside an inner class defined in a different method ,change i to final。

要我改为final类型。报错原因是java不支持闭包。函数内的函数不能引用外部变量。怎么解决这个问题看下一篇

http://www.cnblogs.com/youxin/archive/2013/06/16/3138238.html

参考办法：http://stackoverflow.com/questions/1299837/cannot-refer-to-a-non-final-variable-inside-an-inner-class-defined-in-a-differen