question: public static Array listToArrayTrim ( String list , String delimiter ) { if ( delimiter . length ( ) == 1 ) return listToArrayTrim ( list , delimiter . charAt ( 0 ) ) ; if ( list . length ( ) == 0 ) return new ArrayImpl ( ) ; char [ ] del = delimiter . toCharArray ( ) ; char c ; outer : while ( list . length ( ) > 0 ) { c = list . charAt ( 0 ) ; for ( int i = 0 ; i < del . length ; i ++ ) { if ( c == del [ i ] ) { list = list . substring ( 1 ) ; continue outer ; } } break ; } int len ; outer : while ( list . length ( ) > 0 ) { c = list . charAt ( list . length ( ) - 1 ) ; for ( int i = 0 ; i < del . length ; i ++ ) { if ( c == del [ i ] ) { len = list . length ( ) ; list = list . substring ( 0 , len - 1 < 0 ? 0 : len - 1 ) ; continue outer ; } } break ; } return listToArray ( list , delimiter ) ; }
target:  casts a list to Array object, remove all empty items at start and end of the list