import java.awt.*;
import java.awt.event.*;
public class SimleMenu {
     private Frame f= new Frame("你大爷的");
     private MenuBar mb =new MenuBar();
     Menu file = new Menu("文件");
     Menu edit = new Menu("编辑");
     MenuItem newItem =new MenuItem("新建");
     MenuItem saveItem=new MenuItem("保存");
     MenuItem exitItem=new MenuItem("退出",new MenuShortcut(KeyEvent.VK_X));
     CheckboxMenuItem autoWrap=new CheckboxMenuItem("自动换行");
     MenuItem copyItem=new MenuItem("复制");
     MenuItem pasteItem =new MenuItem("粘贴");
     Menu format =new Menu("格式");
     MenuItem commentItem= new MenuItem("注释",new MenuShortcut(KeyEvent.VK_SLASH,true));
     MenuItem cancelItem = new MenuItem("取消注释");
     private TextArea ta=new TextArea(4,40);
     public void init()
     {
          ActionListener menuListener=new ActionListener()
          {
               public  void actionPerformed(ActionEvent e)
               {
                    String cmd=e.getActionCommand();
                    ta.append("单机“"+cmd+"“才烦"+"\n");
                    if(cmd.equals("退出"))
                    {
                         System.exit(0);
                    }
               }
          };
          commentItem.addActionListener(menuListener);
          exitItem.addActionListener(menuListener);
          file.add(newItem);
          file.add(saveItem);
          file.add(exitItem);
          edit.add(autoWrap);
          edit.addSeparator();
          edit.add(copyItem);
          edit.add(pasteItem);
          format.add(commentItem);
          format.add(cancelItem);
          edit.add(new MenuItem("-"));
          edit.add(format);
          mb.add(file);
          mb.add(edit);
          f.setMenuBar(mb);
          f.addWindowListener(new WindowAdapter()
          {
              public void windowClosing(WindowEvent e)
              {
                  System.exit(0);
              }
          });
          f.add(ta);
          f.pack();
          f.setVisible(true);
    }        
     public static void main(String[] args)
     {
          new SimleMenu().init();
     }
}

  我的eclipse提示找不到或无法加载主类

是不是我的eclipse被我整坏了，好多以前可以运行的代码现在都提示这个错误。。。。。。。。。。。。。。。