consume the current source character and return the next character . concode_field_sep MessageHandler messageHandler concode_elem_sep char EOL concode_elem_sep BufferedReader reader concode_elem_sep String line concode_elem_sep char EOF concode_elem_sep int lineNum concode_elem_sep int currentPos concode_field_sep char currentChar concode_elem_sep int getPosition concode_elem_sep int getLineNum concode_elem_sep void addMessageListener concode_elem_sep char peekChar concode_elem_sep void removeMessageListener concode_elem_sep void sendMessage concode_elem_sep void readLine concode_elem_sep void close
char function ( ) { ++ currentPos ; return currentChar ( ) ; }