public boolean displayTopic(String name){
  String topic=null;
  if (name == null)   topic=DEFAULT + FILE_TYPE;
 else   topic=name.toLowerCase() + FILE_TYPE;
  File helpFile=new File(helpDir,topic);
  return display(helpFile);
}

public boolean displayTopic ( String name ) { String topic = null ; if ( name == null ) topic = DEFAULT + FILE_TYPE ; else topic = name . toLowerCase ( ) + FILE_TYPE ; File helpFile = new File ( helpDir , topic ) ; return display ( helpFile ) ; }
display help for a topic . the name will be lower - cased and extended with the help file suffix , then displayed .
