public static void appendProperty(String propertyName,String value){
  String oldValue=props.getProperty(propertyName);
  if (oldValue != null && !oldValue.equals("none")) {
    oldValue+="," + value;
  }
 else {
    oldValue=value;
  }
  props.setProperty(propertyName,oldValue);
}

public static void appendProperty ( String propertyName , String value ) { String oldValue = props . getProperty ( propertyName ) ; if ( oldValue != null && ! oldValue . equals ( "none" ) ) { oldValue += "," + value ; } else { oldValue = value ; } props . setProperty ( propertyName , oldValue ) ; }
appends a property via a comma separated list < p > if the property does not exist , it adds it .
