java.lang.ClassCastException: java.util.ArrayList cannot be cast to javax.faces.model.SelectItem
jsf-2
Solution
You have to use `f:selectItems`:
<h:selectOneMenu value="#{loginBean.dropDownValue}">
<f:selectItems value="#{loginBean.testDropDown}"/>
</h:selectOneMenu>
`f:selectItem` is used to add a single `SelectItem` to the menu, to add a whole `List` of `SelectItems` you have to use this tag.
Problem
I am trying to make my dropdown dynamic and below is the code and exception i am getting. Please help me out bean: ``` private String dropDownValue; List<SelectItem> testDropDown = new ArrayList<SelectItem>(); List<SelectItem> testDropDownTwo = new ArrayList<SelectItem>(); public String getDropDownValue() { return dropDownValue; } public void setDropDownValue(String dropDownValue) { this.dropDownValue = dropDownValue; } public List<SelectItem> getTestDropDown() { testDropDown.add(new SelectItem("One")); testDropDown.add(new SelectItem("Two")); testDropDown.add(new SelectItem("Three")); testDropDown.add(new SelectItem("Four")); return testDropDown; } ``` XHtml Code: ``` <h:selectOneMenu value="#{loginBean.dropDownValue}"> <f:selectItem value="#{loginBean.testDropDown}" /> </h:selectOneMenu> ``` Exception: exception ``` javax.servlet.ServletException: java.util.ArrayList cannot be cast to javax.faces.model.SelectItem javax.faces.webapp.FacesServlet.service(FacesServlet.java:321) root cause java.lang.ClassCastException: java.util.ArrayList cannot be cast to javax.faces.model.SelectItem com.sun.faces.renderkit.SelectItemsIterator.initializeItems(SelectItemsIterator.java:185) com.sun.faces.renderkit.SelectItemsIterator.hasNext(SelectItemsIterator.java:131) com.sun.faces.renderkit.html_basic.MenuRenderer.renderOptions(MenuRenderer.java:758) com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:840) com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:294) javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:879) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650) ``` Some classcast exception is happening. but i am sending the ArrayList of SelectItem to the list if i change the Value attribute in selectItem tag to itemValue it is not trowing a exception but i am not getting any value i am getting the object names as in the drop down in a single list