// create an array list with 4 integer elements
  ArrayList<Integer> list =  com.google.common.collect.Lists.newArrayList(1,2,3,4); 

  // get an Iterator from the list, and use it to iterate though the list
  for (Iterator<Integer> it = list.iterator(); it.hasNext(); ) {
    // check if this element is even. 
    // If we want the odd numbers, change to != 0 
    if (it.next() % 2 == 0) {
      // remove it if it is even
      it.remove();
    }
  }		

  // print the list
  System.out.println(list);

The commenter said they could almost figure out what it's doing. It's not clear from that that comment if it is just the formatting that was the problem (which I agree, isn't very readable).