Java HashSet object adding

Question

I am trying to go through a text from a file, get each Word and save it as a Word object in a HashSet but i am alway getting the size 1 for the HashSet,it stores only the first object, i dont know maybe there is some really easy way to do it, or maybe i have made some stupid mistake here are you the code:

public static void main(String[] args) throws IOException {
    File file = new File("C:\\Users\\Taner\\Desktop\\words.txt");       
    Scanner input = new Scanner(file);
    HashSet<Word> wordHash = new HashSet<>();

     while (input.hasNextLine()) {
         String line = input.nextLine();      
         for (String retval: line.split(" ", 0)){
             wordTree.add(new Word(retval));
         } 
     }
     input.close();
     System.out.println(wordTree);
}

Answer 1

This can happen if Word has a broken implementation of hashCode and equals : it would seem that all the values added in the HashSet are the same. Check the implementations of those methods in Word .

If you use an IDE like Eclipse or IntelliJ, it can generate correct implementations for hashCode and equals . I suggest you use that.