Hello I'd like to ask if you can assign arrays of beans as a form

for example i have a form:

```
 PageForm{
   Group[] groupArray;

   Group[] getGroupArray(){
      return groupArray;
   }

   void setGroupArray( Group[] groupArray ){
      this.groupArray = groupArray;
   }
}

Group{
   boolean isChecked;

   boolean getIsChecked(){
   return isChecked;
  }

   void setIsChecked( boolean ischecked ){
      this.isChecked = ischecked;
    }
}

```

id like to access this group array in my jsp.
can i do that using this:

```
<spring:form>
  <spring:checkbox path="groupArray[0].isChecked" />
  <spring:checkbox path="groupArray[1].isChecked" />
  <spring:checkbox path="groupArray[2].isChecked" />
</spring:form>

```

What i get is an exception:

> 
> org.springframework.beans.NullValueInNestedPathException:
>  Invalid property 'groupArray[0]' of
>  bean class [PageForm]: Cannot access
>  indexed value of property referenced
>  in indexed property path
>  'groupArray[0]': returned null
> 
> 
> 

Please help me.

Thanks.