Error selectOneChoice component

Question

HI All,
My intention is to populate a selectOneChoice component with some selection items
I have posted couple of messages on the same topic, but could not find the solution..
Here is the content that i have got from a blog... i have followed all the steps but am getting an error....
also i could not find what is value="#{ModelData.department}" for <af:selectOneChoice> tag... here in the complete example we dont have any class called ModelData.. what that binding means......
CODE
======
Add the following code in the ADF page.
<af:selectOneChoice label="Department" value="#{ModelData.department}">
<f:selectItems value="#{DepartmentOptions.departments}"/>
</af:selectOneChoice>
In ADF, selectOneChoice is used for drop down list.
selectOneChoice picks the list of values from 'selectItems' tag.
You can define a managed bean to bind an ArrayList of SelectItem objects to 'selectItems'. or can define a view object and bindings. In this example I have defined a managed bean which provides an ArrayList of SelectItem objects.
Department list Backing bean code.
import java.util.ArrayList;
import java.util.List;
import javax.faces.model.SelectItem;
public class DepartmentOptions {
private List departments;
public DepartmentOptions() {
departments = new ArrayList();
SelectItem department = new SelectItem("10", "Electric");
departments.add(department);
department = new SelectItem("20", "Mechanic");
departments.add(department);
department = new SelectItem("30", "Computer");
departments.add(department);
public void setDepartments(List departments) {
this.departments = departments;
public List getDepartments() {
return departments;
In the above code it is clear that value attribute for <f:selectItems\> tag referring to the bean written above...
but what is value="#{ModelData.department}"> for <af:selectOneChoice\> where we do not have ModelData class itself
please Give me some pointers on this ...
Thanks in advance,
Naveen
Message was edited by:
Naveen Kumar Borra

Answer 1

Naveen Kumar Bora,
I agree with you - I've read that blog entry, and it seems to be missing some critical bits of information. I suggest you have a look at either the Oracle ADF Developer's Guide for Forms/4GL Developers section 19.7 (if you're using ADF BC) or Oracle ADF Developer's Guide section 11.7.
Note for the future: if you're asking a question about a blog post, it really helps if you put a link to the post you're asking about, wouldn't you agree?
Hope this helps,
john