Need help with creating a hashset and selecting distinct sorted data

[elpeak]

I read in a text file to created a hashmap based on the users id which is unique. This works fine, however, I also need to extract the users name, but I only need the name once and sorted. I am trying to do this with a hashset with some success. I can get the data but there are duplicates and it's not sorting. I thought the hashset would do this automatically.

Is it possible to extract this data into a hashset from the hashmap as describe above? I've put a sample of hashmap.

HashMap value = new HashMap();
    /** Creates new form TestHashMap */
 
 
 
 
 
  public void fileRead() throws Exception
  {
 
                FileReader fr = new FileReader("C://Documents and Settings//epeak//My Documents//test.txt");
        BufferedReader br = new BufferedReader(fr);
        String s;
        while((s = br.readLine()) != null) {
        Pattern p = Pattern.compile("[\\s]+");
        String[] str = p.split(s);
 
//        System.out.println(str[0] + " "+str[1] +"   "+str[2]+"   "+str[3]);
                 Propertyunbuf prop = new Propertyunbuf();
         prop.setPropertyId(str[0]);
         prop.setPropertyName(str[1]);
                 prop.setPropertyValue( new Double(str[2]));
//         prop.setPropertyValue(new Double(str[2]).doubleValue());
         prop.setAgendId(str[3].trim());
//                 System.out.println(str[1]);
 
 
 
 HashSet ref = new HashSet(); // create a HashSet
         Iterator i = ref.iterator(); // get iterator
 
         System.out.println( "\nNonduplicates are: " );
         while ( i.hasNext() )
             System.out.print( i.next() + " " );
 
         System.out.println();

[Oralloy]

@elpeak,

First off, please use code tags. There's a FAQ page that might help you here.

Second, not to nit pick, but you really should qualify your generic containers - it really helps keep things straight when projects grow. There is little worse than trying to figure out what exactly is in that map you just got from a method with no other significant documentation.

Here is a method that I wrote to give a sorted list of the keys from a HashMap, which compiles...

  private void merple()
  {
    java.util.HashMap<String, Object> map = new java.util.HashMap<String, Object>();
    java.util.ArrayList<String> array = new java.util.ArrayList<String>();
    array.addAll(map.keySet());
    java.util.Collections.sort(array);
  }