Iterating through a list of the online players

I have created an ArrayList of online players that I want to be printed out every time that the user types a command; I have no prior knowledge about this really, but I was attempting a guess like this (but it failed):

Code:

ListIterator<Player> humans = ZombieEscape.online.listIterator();
 
sender.sendMessage(ChatColor.GREEN + "Online: " + humans);
return true;

How would I get it to iterate through the list and print out the player names?

 

Code:java

        String OnlinePlayers = "Online Players: ";
        for (Player player : humans)
        {
            OnlinePlayers.concat(player.getName() + ", ");
        }

 

Yes, but horribly inefficient, and you'd have to do OnlinePlayers = OnlinePlayers.concat(player.getName() + ", "); as Strings are immutable.

Code:java

public static String getOnlinePlayers(List<String> players){ //Don't save player instances.
 
    StringBuilder onlinePlayers = new StringBuilder( ); //Create a new StringBuilder
 
    for(String s : players) //Iterate.
      onlinePlayers.append(", ").append(s); //Append the ", name" on the end.
 
    if(onlinePlayers.length > 2) //It will be less than two if there are no players in the list.
        return "Online Players: " + onlinePlayers.subString(2); //Substring to remove the ", " prefix.
 
    return "Online Players: "; //There weren't any players in it anyway, no need to concat the blank string on the end.
 
}

 

Thank you guys so much for the help! There were a couple issues I had to work around, but I got it solved. You both deserve a like