question: public static Word [ ] prepareStringToken ( String str ) { if ( str == null ) { return new Word [ 0 ] ; } final ArrayList < Word > strWithDelim = new ArrayList < Word > ( ) ; splitWordBySpace ( str , strWithDelim ) ; final Word [ ] toRet = new Word [ Math . min ( strWithDelim . size ( ) , MAX_NUM_WORDS ) ] ; for ( int i = 0 ; i < Math . min ( strWithDelim . size ( ) , MAX_NUM_WORDS ) ; i ++ ) { toRet [ i ] = strWithDelim . get ( i ) ; } return toRet ; }
target:  Split the string into an array of words separated by whitespace or specific delimiters. The input string should be all one token.