This hashtable stores pinyin in the input format used by
ConverterTableInterface.lookupByPinyin and maps it into a char[]
representing the Unicode characters which correspond to the
given pinyin.
This class is a DocumentListener which aggregates calls to
removeUpdate() and insertUpdate() and calls an ActionListener if
enough time elapses without receiving any removeUpdate or
insertUpdate calls.
This class is a ModifyListener which aggregates calls to
modifyText() and calls an ActionListener if enough time elapses
without receiving any modifyText() calls.