@Override public String toString(){
  StringBuilder builder=new StringBuilder();
  try {
    appendTo(builder);
  }
 catch (  IOException e) {
    throw new RuntimeException(e);
  }
  return builder.toString();
}

@ Override public String toString ( ) { StringBuilder builder = new StringBuilder ( ) ; try { appendTo ( builder ) ; } catch ( IOException e ) { throw new RuntimeException ( e ) ; } return builder . toString ( ) ; }
returns the string of xml corresponding to this xmlelement .
