returns the sort key for the element at the given index and reuse the input key if possible . the default implementation ignores the reuse parameter and invokes getkey buffer , int . if you want to override this method , you must implement newkey . concode_field_sep PlaceHolder placeHolder concode_field_sep K newKey concode_elem_sep void copyElement concode_elem_sep Buffer allocate concode_elem_sep void swap concode_elem_sep void copyRange
K function ( Buffer arg0 , int arg1 , K arg2 ) { throw new RuntimeException ( ) ; }