Iterating though a List with a 'next' button.

Question

Hey people,
I am just finishing off my GUI but I had a thought, I really would like to have next and previous buttons so I can move through my list.
However I started by implementing the 'Next' button, but I have run into some trouble, on the GUI I want the user to click next and it moves obviously to the next record, then they can hit it again and it moves onto the next record again.
However when I tried to do this, the interator refuses to move to the next record, it just stays at they record with the index of 0.
I've read some books, done some research and tried all the ways I can think of, but to no avail, my code for the 'Next' method is below, the button on the GUI just calls it from a separate class.
public void MusicNext()
ListIterator titerator = iList.listIterator();
if(titeration.hasNext())
System.out.println(titerator.next());
}

Answer 1

Hmmm, I am a little confused (yes I am stupid), heres my code:
import java.util.*;
public class MusicList
            private List iList;  //names are stored in a list.
     public MusicList()
          iList = new LinkedList();
     public MusicList(List pListOfMusic)
          iList = pListOfMusic;
        //Here's the interator, but I get a null pointer exception error.
        ListIterator titerator = iList.listIterator();
        public void MusicNext()
                if(titerator.hasNext())
          System.out.println(titerator.next());
     public void addMusic(Music pMusicName)
            iList.add(pMusicName);
     public void removeMusic(Music pMusicName)
          iList.remove(pMusicName);
        //Return the name with the given surname, otherwise return null.
     //Uses a linear search.
        public Music findTitle(String pTitle)
          Music tTitle = null;
          boolean found = false;
          Iterator it = iList.iterator();
          while (it.hasNext() && !found)
               tTitle = (Music) it.next();
               found = tTitle.getTitle().equalsIgnoreCase(pTitle);
          if(!found) tTitle=null;
          return tTitle;
     public Music findAuthor(String pAuthor)
          Music tAuthor = null;
          boolean found = false;
          Iterator it = iList.iterator();
          while (it.hasNext() && !found)
               tAuthor = (Music) it.next();
               found = tAuthor.getAuthor().equalsIgnoreCase(pAuthor);
          if(!found) tAuthor=null;
          return tAuthor;
        public Music findPublisher(String pPublisher)
          Music tPub = null;
          boolean found = false;
          Iterator it = iList.iterator();
          while (it.hasNext() && !found)
               tPub = (Music) it.next();
               found = tPub.getPublisher().equalsIgnoreCase(pPublisher);
          if(!found) tPub=null;
          return tPub;
     public String toString()
          return "Music List = " + iList.toString();
}Thanks,
Rob.