title: Beancomparator not working with null values
body: <p>My requirements is to sort list of Customer type beans according to <code>customername</code> property in that bean... for that i used <code>beancomparator</code>.it is working fine when <code>customername</code> field is not <code>null</code>.
  It is throwing <code>NullPointerException</code> when the field is <code>null</code>..please help me out..</p>
  
  <p>my code is</p>
  
  <pre><code>public class customer{
  private String customername;
  }
  
  main()
  {
  list&lt;customer&gt; list=new arraylist();
  //list is filled with customertype beans
  comparator&lt;customer&gt; comp=new beancomparator(customername);
  collections.sort(list,comp);//throwing error when customername is null...
  }
  </code></pre>