右键弹出菜单执行问题

[阿_布]

右键弹出菜单，只在导航视图的project名上出现“导入资源”菜单，下面的程序可以在右键菜单中显示“导入资源”，但是当单击的时候出现一个对话框，提示The chosen operation is not currently available。请高手指点，多谢！！！

<plugin>  
   <extension   
         point="org.eclipse.ui.popupMenus">   
      <objectContribution  
      		adaptable="true"
            id="resources"  
            objectClass="org.eclipse.core.resources.IProject">   
         <action   
               class="solonote.example.popupmenu.ActionLoader"  
               id="solonote.example.popupMenu.loadaction"  
               menubarPath="additions"
               enablesFor="1"
               label="导入资源">   
         </action>   
         <visibility>
            <objectState
                  name="projectNature"
                  value="org.eclipse.jdt.core.javanature">
            </objectState>
         </visibility>
      </objectContribution>   
   </extension>
</plugin>

public class ActionLoader implements IObjectActionDelegate {   
	private IProject selectProject = null;
	
	public ActionLoader(){
		super();
	}
	  
    public void setActivePart(IAction action, IWorkbenchPart targetPart) {   
        // TODO Auto-generated method stub   
  
    }   
  
    public void run(IAction action) {   
        // TODO Auto-generated method stub
    	File f = new File("导入资源");
    	try {
			selectProject.refreshLocal(IProject.DEPTH_INFINITE,null);
		} catch (CoreException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }   
  
    public void selectionChanged(IAction action, ISelection selection) {
    	 // TODO Auto-generated method stub   
    	if (selection instanceof StructuredSelection) {
            StructuredSelection structSelection = (StructuredSelection) selection;
            Object object = structSelection.getFirstElement();
            if(object instanceof IProject){
            	selectProject = (IProject)object;
            }
        }
    }   
} 

[Java技术栈]

The chosen operation is not currently available
当前选择无效。。

哪一句出错了？

[阿_布]

回楼上，代码全在上面啊！就这么几行，找不出哪里有错了。

[霜之哀伤]

调试运行的时候出错还是插件导出以后运行出错？

如果是调试，那么一般在你的工作区间的上层目录下，有个application-runtime（除非你手动设置过）这样的文件夹，下面的.metadata\.log这个文件，看看文件末尾有没有错误日志。

[阿_布]

是调试的时候出现的,.log里面提示信息：
org.osgi.framework.BundleException: The activator test1.Activator for bundle test1 is invalid

Caused by: java.lang.ClassNotFoundException: test1.Activatotr

test1.Activator是必须的吗？

[霜之哀伤]

是必须的，这个是插件的启动类，创建项目的时候会给你自动生成一个的，莫非把它删了？