set focus on first field by default

     /**

     * To set focus in first field in af:table

     *

     */

    public static void setFocusInTableFirstField(RichTable table, String componentId) {

        FacesContext facesContext = FacesContext.getCurrentInstance();

        String tableId = table.getClientId(facesContext);

        RowKeySet rks = table.getSelectedRowKeys();

        String inputId = null;

        if (rks != null && rks.size() > 0) {

            Object rowKey = rks.iterator().next();

            String rowId = table.getClientRowKeyManager().getClientRowKey(facesContext, table, rowKey);

            inputId = tableId + ":" + rowId + ":" + componentId;

            System.out.println("@@ClientId Value:" + inputId);

        } else {

            // handle error

        }

        ExtendedRenderKitService service = Service.getRenderKitService(facesContext, ExtendedRenderKitService.class);

        service.addScript(facesContext,

                          "   var comp = AdfPage.PAGE.findComponent('" + inputId + "');" + "   if(comp!=undefined){ comp.focus(); } ");

    }

and call this method in any button action

setFocusInTableFirstField(getT3(), "soc6");

On Enter Date assigning

  /**

   * assigning date by double click

   * @param evt 

   */           

            function setDate(evt) {

            var comp = evt.getSource()

            if (evt.getKeyCode() == AdfKeyStroke.ENTER_KEY) {

            comp.setValue(new Date());

            }

            }

<af:clientListener method="setDate" type="keyPress"/>