How to remove stop words in java?

Question

I want to remove stop words in java.

So, I read stop words from text file.

and store Set

Set<String> stopWords = new LinkedHashSet<String>();
BufferedReader br = new BufferedReader(new FileReader("stopwords.txt"));
        String words = null;
        while( (words = br.readLine()) != null) {
            stopWords.add(words.trim());
            }
        br.close();

And, I read another text file.

So, I wanna remove to duplicate string in text file.

How can I?

Answer 1

using set for stopword :

Set<String> stopWords = new LinkedHashSet<String>();
        BufferedReader SW= new BufferedReader(new FileReader("StopWord.txt"));
        for(String line;(line = SW.readLine()) != null;)
           stopWords.add(line.trim());
        SW.close();

and ArrayList for input txt_file

BufferedReader br = new BufferedReader(new FileReader(txt_file.txt));
//make your arraylist here

// function deletStopWord() for remove all stopword in your "stopword.txt"
public ArrayList<String> deletStopWord(Set stopWords,ArrayList arraylist){
        System.out.println(stopWords.contains("?"));
        ArrayList<String> NewList = new ArrayList<String>();
        int i=3;
        while(i < arraylist.size() ){
            if(!stopWords.contains(arraylist.get(i))){
                NewList.add((String) arraylist.get(i));
            }
            i++;        
            }
        System.out.println(NewList);
        return NewList;
    }

  arraylist=deletStopWord(stopWords,arraylist);