How to remove item from List interface in java? -

I have an ArrayList . When I try to delete an item, I'm getting a unsupported exception . How can I solve it? Can anyone help please

Here's my code:

  Fixed list & lt; String & gt; Available form list = new arrelisted & lt; String & gt; (); AvailableFormsList.add ("A"); AvailableFormsList.remove ("A");    
 
 
 It just works well:  
  Import java .util.ArrayList; Import java.util.Collections; Import java.util.list; / ** * LISTDOMO * @AtherMDFI * @SSUS 6/21/13 7:45 AM * @ link http://stackoverflow.com/questions/17234415/how-to-remove-item-from-list-interface- In-java * / public class listmo {public static zero main (string [] args) {list & lt; String & gt; AvailableForms = New Arreelist & lt; String & gt; (); collection. All (available form, args); System.out.println ("before:" + + available form); If (args.length & gt; 0) {availableForms.remove (Args [0]); System.out.println ("After:" + + Available Forms); }}}