public void addMeta(char meta,String replacement){
  metaCharacterSet.set(meta);
  replacementMap.put(new String(new char[]{meta}),replacement);
}

public void addMeta ( char meta , String replacement ) { metaCharacterSet . set ( meta ) ; replacementMap . put ( new String ( new char [ ] { meta } ) , replacement ) ; }
add a metacharacter and its replacement .
