[ JDK VERSION : 1.5.0_06 ]

NetBeans 5.5 Beta + Enterprise Pack
Windows XP
JDK1.5.0_06

1. In Java DB, Create a table that has primary key as "SMALLINT", another row is also "SMALLINT" 
2. Create a Web application project
3. Create Entity class by "Persistence->Entity Classes from Database", use the table
4. Create Persistence Unit for it
5. Create JSF Pages from Entity Class, select the Entity class

Now we have "<tablename>Controller.java" and "<tablename>Converer.java" in source directory,
these two files contain these codes blow, but it can not compile it by error,

    public Object getAsObject(FacesContext facesContext, UIComponent uIComponent, String string) {
        MytableController controller = (MytableController) facesContext.getApplication().getELResolver().getValue(
            facesContext.getELContext(), null, "mytable");
        java.lang.Short id = (java.lang.Short)string;
        return controller.findMytable(id);
    }

    public Mytable getMytableFromRequestParam() {
        ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
        HttpServletRequest request = (HttpServletRequest)ec.getRequest();
        String param = request.getParameter("key");
        java.lang.Short id = (java.lang.Short)param;
        return em.find(Mytable.class, id);
    }

The compile error happens in

        java.lang.Short id = (java.lang.Short)string;