Binary search in List of Lists

Question

Hi,
I have List of Lists (i.e an List of ArrayList within ArrayList), now i have being trying to do use binarySeach using the comparator api in Collections framework .. but no luck . Can someone help me out
thanx
sharad

Answer 1

Yes i have the listed sorted using the sort api on collections framework... following is the piece of code which sorts the String numbers stored in List of Lists. (please note the following code has been modified from its original source, so that i can post it across forums). Now using the binarysearch api in Collection framework .. i need to search for string say 5401880000 .. can i do it.
import java.util.*;
public class MySort
     public static void main(String args[])
          List innerList = new ArrayList();
          List outerList = new ArrayList();
          innerList.add(new String("5889319999"));
          innerList.add(new String("5889310000"));
          outerList.add(innerList);
          innerList = new ArrayList();
          innerList.add(new String("5401880000"));
          innerList.add(new String("5401889999"));
          outerList.add(innerList);
          innerList = new ArrayList();
          innerList.add(new String("5425550999"));
          innerList.add(new String("5425550000"));
          outerList.add(innerList);
          System.out.println ("unsorted list ---> "+outerList);
// sorting the collections ...
          Collections.sort(outerList, new Comparator()
          public int compare(Object o1, Object o2)
          List list1 = (List) o1;
          List list2 = (List) o2;
          String d1 = (String) list1.get(0);
          String d2 = (String) list2.get(0);
          return d1.compareTo(d2);
          System.out.println("Sorted: " + outerList);