public static List iteratorToList(Iterator iter) 
{
        List< T > ret = new ArrayList< T >();
        while (iter.hasNext()) {
            ret.add(iter.next());
        }
        return ret;
}

 public static boolean iteratorsContentEqual(Iterator iter1,
    Iterator iter2) 
{
        while (iter1.hasNext() && iter2.hasNext()) {
            if (!iter1.next().equals(iter2.next())) {
                return false;
            }
        }
        if (iter1.hasNext() || iter2.hasNext()) {
            return false;
        }
        return true;
}

 public static List listToIndexElementPairList(List list) 
{
        List< Pair< Integer, T > > ret = new ArrayList< Pair< Integer, T > >();
        Iterator< T > listIter = list.iterator();
        for (int i=0; i< list.size(); i++) {
            ret.add(Pair.make(i, listIter.next()));
        }
        return ret;
}

Transforms a list of arbitrary elements to a list of index-element pairs.

 public static Map newHashMap() 
{
        return new HashMap< K,V >();
}

 public static Set newHashSet() 
{
        return new HashSet< E >();
}

 public static Map newLinkedHashMap() 
{
        return new LinkedHashMap< K,V >();
}

 public static boolean objectsEqual(Object obj1,
    Object obj2) 
{
        if (obj1 == null) {
            return obj2 == null;
        }
        return obj1.equals(obj2);
}