question: public void addWords ( String phrase ) { if ( phrase . equals ( "#" ) || phrase . equals ( "" ) ) return ; String [ ] words = spliterator ( phrase ) ; if ( words . length < 2 ) return ; for ( int i = 0 ; i < words . length ; i ++ ) { if ( i == 0 ) { Vector < String > startWords = chain . get ( "_start" ) ; startWords . add ( words [ i ] ) ; Vector < String > suffix = chain . get ( words [ i ] ) ; if ( suffix == null ) { suffix = new Vector < > ( ) ; suffix . add ( words [ i + 1 ] ) ; chain . put ( words [ i ] , suffix ) ; } } else if ( i == words . length - 1 ) { Vector < String > endWords = chain . get ( "_end" ) ; endWords . add ( words [ i ] ) ; } else { Vector < String > suffix = chain . get ( words [ i ] ) ; if ( suffix == null ) { suffix = new Vector < > ( ) ; suffix . add ( words [ i + 1 ] ) ; chain . put ( words [ i ] , suffix ) ; } else { suffix . add ( words [ i + 1 ] ) ; chain . put ( words [ i ] , suffix ) ; } } } }
target:  Add words from phrase to chain