2.  try {
3. 
   
4.     for(int i=0; i< availableUsers.length; i++) {
5.       if (!FromGoogleTalk[i].equals("")) {
6.         if (FromGoogleTalk[i].equals("yes") ) {
7.           selectedPlayers =  append(selectedPlayers,i);
8. 
   
9. 
   
10.           newChat[i].sendMessage("message");
11. ;
12.           FromGoogleTalk[i] = "";
13.         }
14.       }
15.       //   newChat.sendMessage(humanResponse);
16.     }
17.   }
18.   catch (XMPPException e) {
19.     System.out.println("Error Delivering block");
20.   }

Hi, i have a small problem. I want to check if there is no nullpointerexeption, then it must run this script. How should i do this?