How to implement drop down list in ADF

In this how-to example I am defining a department drop down list, which shows a list of departments.

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;
    }
}