jsf - Using <h:dataTable><h:inputText> on a List<String> doesn't update model values -

i've below data table:

<h:datatable var="row" value="#{mybean.listofstrings}">     <h:column>           <h:inputtext value="#{row}" />     </h:column> </h:datatable> 

which tied list<string>:

private list<string> listofstrings = new arraylist<string>();  public list<string> getlistofstrings() {     return listofstrings; }  public void setlistofstrings(list<string> listofstrings) {     this.listofstrings = listofstrings; } 

when enter value in field , save form not passing value field in list, setting null, doing wrong here?

the string class immutable. doesn't have setter instance value. getter in construct object#tostring() method implicitly called el, coincidentally returns string value itself.

you need set changed value new list item instead. can via brace notation on list whereby pass list index: #{mybean.listofstrings[index]}.

so, should do, making use of uidata#getrowindex() list index:

<h:datatable binding="#{table}" value="#{mybean.listofstrings}" var="row">     <h:column>           <h:inputtext value="#{mybean.listofstrings[table.rowindex]}" />     </h:column> </h:datatable> 

(note: value expression of binding as-is! don't bind bean property)

see also:

• using <ui:repeat><h:inputtext> on list<string> doesn't update model values
• what component binding in jsf? when preferred used?