public String toString(){
  StringBuilder sb=new StringBuilder(super.toString());
  sb.append("<");
  if (intervals != null) {
    for (    IInterval i : intervals) {
      sb.append(i);
      sb.append(',');
    }
  }
  sb.append(">");
  return sb.toString();
}

public String toString ( ) { StringBuilder sb = new StringBuilder ( super . toString ( ) ) ; sb . append ( "<" ) ; if ( intervals != null ) { for ( IInterval i : intervals ) { sb . append ( i ) ; sb . append ( ',' ) ; } } sb . append ( ">" ) ; return sb . toString ( ) ; }
reasonable extension to tostring ( ) method .
