private void populateTimeFields(){
  leftStore.setTimeFields(timeFieldStr.split(",")[0]);
  rightStore.setTimeFields(timeFieldStr.split(",")[1]);
}

private void populateTimeFields ( ) { leftStore . setTimeFields ( timeFieldStr . split ( "," ) [ 0 ] ) ; rightStore . setTimeFields ( timeFieldStr . split ( "," ) [ 1 ] ) ; }
specify the comma separated time fields for both steams
