code: public static int[] Unique(int[] values) {
          HashSet<Integer> lst = new HashSet<Integer>();
          for (int i = 0; i < values.length; i++) {
              lst.add(values[i]);
          }
  
          int[] v = new int[lst.size()];
          Iterator<Integer> it = lst.iterator();
          for (int i = 0; i < v.length; i++) {
              v[i] = it.next();
          }
  
          return v;
      }
docs: Get unique values form the array.
  
  @param values Array of values.
  @return Unique values.