public MatchingNode(String feature,String regex,int qtrue,int qfalse){
  super(feature,regex,qtrue,qfalse);
  this.pattern=Pattern.compile(regex);
}

public MatchingNode ( String feature , String regex , int qtrue , int qfalse ) { super ( feature , regex , qtrue , qfalse ) ; this . pattern = Pattern . compile ( regex ) ; }
create a new matchingnode with the given values .
