Thread not updating boolean array correctly

else







{ if(message.substring(0,4).equals("join"))







{ /* if the first word in the message is "join" then another friend







has joined the message service, retrieve the name of friend







and enable their name button in GUI */

String temp = message.substring(4,message.length());







addOutput("OBSERVE" + temp);







changeFriends(temp, true);

// output message in output area







addOutput(message.substring(4,message.length()) + " has joined the server");







}

Thats the code that adds adds a user to the loggedOn array it does so by calling changeFriends

void changeFriends(String name, boolean b)







{ // change a friend's "online" status

for(int i = 0; i<names.length; i++) //loop through all names







{

if(names[i].equals(name) ) //if a match is found to passed in name







{







loggedOn[i] = true; //store that they are logged on







}







}







// call method to update buttons







isOnline();







}

Thats the method which looks through ausername array for passin username, it then uses the position of the username to set the same position in loggedOn to true