In order to enable editing, first we need to set the editable attribute of the table to true. Each column definition that we need to be editable should contain the <p:cellEditor> helper component that will contain two facets to render output components—one to visualize the data for the user and the other to get input data from the user. The in-place editor palette, which is the <p:rowEditor> component, also needs to be rendered in a column of dataTable in order to activate editing with user interaction. Here's the code that encapsulates the discussion in this paragraph:

<p:dataTable id="inCellEditing" var="car"
  value="#{dataTableBean.cars}" rowKey="#{car.name}"
  editable="true">
  <p:column headerText="Year">
    <p:cellEditor>
    <f:facet name="output">
      <h:outputText value...