JSF 2.x Tip of the Day: <ui:fragment/> and Namespaces

A junior engineer lamented that he could not get NetBeans auto-completion to work, and that his xhtml pages were all red. He wished that NetBeans could be "smarter".

I told him it was "smarter", but he needed to show a little understanding. His problem was that he was using the <ui:fragment/> without namespaces defined.

So here is how you do it to avoid a sea of red.

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<ui:fragment xmlns:ui="http://java.sun.com/jsf/facelets"              xmlns:h="http://java.sun.com/jsf/html">     <h:outputText value="QRS"/>     <h:form id="form2">         <h:inputText id="x"/>         <h:commandButton value="Submit"/>     </h:form> </ui:fragment>

Notice how I just simply added the namespaces as attributes right to the <ui:fragment/>. No more red, and NetBeans is happy.