如何在JSF的数据表顶部添加新行？

Question

Every time I add a new row in my datatable (via commandbutton "new Feedback") it is added at the bottom of the datatable. How can I add it and make sure that it will appear at the top?

<h:form>
    <h:inputText value="#{helloBean.content}" ></h:inputText>
    <h:commandButton value="send message"
        action="#{helloBean.multiAufruf}">
    </h:commandButton>
    <h:commandButton value="new Feedback"
        action="#{helloBean.gettingFeedbackMulti}">
    </h:commandButton>

    <h:dataTable value="#{helloBean.sentMessagesList}" var="message">
        <h:column>
            <h:inputText value="#{message.content}"></h:inputText>
        </h:column>
        <h:column>
            <h:outputText value="#{message.time}"></h:outputText>
        </h:column>
        <h:column>
            <h:outputText value="#{message.idList}"></h:outputText>
        </h:column>
        <h:column>
            <h:outputText value="#{message.feedbackz}"></h:outputText>
        </h:column>
    </h:dataTable>
</h:form>

Answer 1

In your action method for the command gettingFeedbackMulti , you are probably doing something like this

sentMessagesList.add(message);

Just change it to use add() with index argument like this

sentMessagesList.add(0, message);

This will add it to index 0 of your list