removing stopwords from a word list

hi,

i have a word list from which i need to remove stopwords.. i have a stopword list stroed in array a. im reading the array and then checking it with my word list... my word list contains elements as follws..

it
Belgium
's IMEC
a threeyear collaboration agreement
all
advanced metallization process

i want to remove words like it, all from this list... but my code does not recognise it and all.. it recognises only the all in "advanced metallization process" word. i want to remove only the pronouns that are as a whole in the list. here is my code..pls help..

Code Java:

for(Iterator f = words1.iterator();f.hasNext();){
                            String anew = f.next().toString();
                            System.out.println(anew);
                            for(int iFilt = 0; iFilt<a.length; iFilt++) {
                                System.out.println("checking for " + a[iFilt]);
                                if(anew.indexOf(a[iFilt]) != -1){
 
                                    System.out.println(a[iFilt]+""+"found!"+"in"+anew);
                                    anew = anew.replace(a[iFilt],"");
 
                           }
 
                           }
}