In JSF, explain the usage of f:selectItem and f:selectItems tags.
In JSF, explain the usage of f:selectItem and f:selectItems tags.
The f:selectItem and f:selectItems tags represent components that can be nested inside a component that allows you to select one or multiple items. An f:selectItem tag contains the value, label, and description of a single item. An f:selectItems tag contains the values, labels, and descriptions of the entire list of items. You can use either a set of f:selectItem tags or a single f:selectItems tag within your component tag.
The following example shows the usage of <f:selectItems> tag.
<h:selectManyCheckbox id=”languagecheckbox”
                     layout=”pageDirection”
                     value=”#{student.language}”>
   <f:selectItems value=”#{student.languageItems}”/>
</h:selectManyCheckbox>
This code snippet allows to select multiple check boxes from a list of languages from the Student managed bean.
The f:selectItem tag represents a single item in a list of items. The following example shows the usage of <f:selectItem> tag.
<h:selectOneMenu id=”studentGrade” value=”#{student.studentGrade}”>
   <f:selectItem itemValue=”A” itemLabel=”#{grade.A}”/>
   <f:selectItem itemValue=”A+” itemLabel=”#{grade.A+}”/>
   <f:selectItem itemValue=”B” itemLabel=”#{grade.B}”/>
</h:selectOneMenu>
The itemValue attribute represents the value for the f:selectItem tag. The itemLabel attribute represents the String that appears in the drop-down menu component on the page, represents the value from the managed bean Grade.